QNAP TS451 LPC Fix and rant

This video goes through the identification and fixing of a QNAP TS451 that does not boot.
There is an additional video showing the pinouts a bit closer if needed. • NAS TS 451+ LPC Close ...

[@MaxWattage]

Thank you! I have the TS-851 which uses the Celeron J1800, which contains the same Intel manufacturing bug as the Atom. My NAS had failed to boot. In my case it was the lower FET in the CPU's LPC clock output driver which had weakened, so the average voltage of the clock waveform was too high. I have a digital storage oscilloscope so I was able to observe the clock waveform and optimise it. The LPC clock spec says it's average voltage should be 1.7V, and in my case, I found that adding a 150 ohm pull-down resistor was optimal to make the average voltage of the square-wave 1.7V. Then the NAS booted again, all the data was intact. (Yes all the data was all backed up to two other locations, but I'm still very happy that my NAS is working again)

[@powerevolutions]

Awesome work...glad you were able to get it up and running again.

[@powerevolutions]

For those that don't keep track of which drives came out of which slots, there is a procedure on QNAP's forum for identifying them. Depending on which firmware is installed, you can damage your data in the raided disk if you install them in the wrong order.

[@abhishekthomas85]

@@powerevolutions i have TS 453 URP i did try your solution but it isnt working how do I find out which resistor to put on, i used 100ohm resistor

[@powerevolutions]

@@selwin9095 If >1.65V likely needs a pulldown (resistor to ground), if

[@bornlibra23]

@@powerevolutions Among which pins are there to be measured?

[@bugwan1]

Another happy customer here! My 6-year old NAS had finally died... Thanks to this info I was able to solder in a 100ohm resistor on my Qnap TS-453 Pro board and it booted immediately. My model had no headers, so I soldered directly to the board. Really appreciate you sharing this info so we can get our gear working again

[@rvoltmann5719]

I am no electronics guy, but i did this fix on my TS-451 and it works. My wife is so impressed with me. Sorry I didn't tell her it was all your idea. Saved me $669.00 for a new qnap and I have some files I didnt have backed up. Thanks a bunch for posting this!!

[@StMickeyS]

How did you do it? Can you post a video?

[@rvoltmann5719]

@@StMickeyS I just followed the video

[@DrDeepspace]

Unfortunately I was not aware of this issue until today....when my TS-451+ failed. I was sitting right next to it and it beeped a few times, sent me a fan 1 fail error, ( the fan was still running), and half the drive lights went out. Unit did shut itself down, tried to restart, but could not boot. Looking SO forward to spending the foreseeable future trying to bring it back to life and recover my data. Thanks for paving the way.

[@forestranger29]

Success on TS-251+ - So glad I found this & the supplemental pin-out/close up video! Lost the encryption key in a pc failure several years ago & didn't know it until I tried to move the drives to another QNAP. This helped me recover years and years irreplaceable of CAD drawings. I cannot thank you enough for making these videos!

[@billcsho]

That fix works on my TS-251 too after I ordered a TS-264 as replacement. Now I am back to have 3 working NAS at home again. Thank you very much.

[@bobpearn30]

Your video fixed my 451+, Thank you! I was prepared to connect a jumper with DuPont connectors and was disappointed to find there is not enough room provided. Soldering directly to the pins, a 100 ohm resistor to ground worked right off the bat. It took me less than an hour and most of that time was dismantling and reassembling the unit. I'm not sure but I don't think there was a single screw left in the box. Thx again, Bob

[@michaelortiz5317]

You saved me from having to buy a TS-464! The fix worked like a charm on my TS-451. Thank you!

[@raedq5353]

You are a hero! I thought I had just lost my data on my TS251+. Your fix saved the day. But as you mentioned in the video, it remains to be seen how long this fix will last. Nevertheless, it should be a lesson to me to make backups more often. THANK YOU. 😄

[@ZacharySchock90]

I was unaware of this issue until my TS-451 wouldn't boot. Thankfully I found this video! I do not have an oscilloscope, and didn't know what exactly my readings should by with a multimeter. I ordered some 100ohm resistors online. Soldered one on and it came back to life. Due to it already not working I took a shot in the dark as to what exactly my issue was. I ordered a newer nas, so this fix has to limp me along until it arrives. It is ashame they couldn't even give us a courtesy of the known issue, but then they would be admitting guilt and would be liable I guess. Thank you for having this information out there for anybody willing to try and revive their units.

[@aa777888]

Fantastic video. I just fixed two TS-453Pro units this way. It's super easy on that model, no need to disassemble further than taking the cover off. Thank you!

[@diegocastroviadero9767]

It worked!! I've just fixed my TS251. Thank you for investigating it and taking the time to record this video and publishing it to the world. I have plans to replace my qnap with something different. This fix has allowed me to have the very last version of data.

[@marekbrylewski3630]

Thank you, this fix has worked on my TS-653 PRO with the same booting issue problem. I had to solder the resistor 100ohm 0.5watt directly to the board as there are no posts on my board. I also used a 1mm mini drill bit to open the holes to feed the resistor legs thru the board, it made it easier to solder and trim the legs as required. It is amazing that QNAP support never mentioned this as a potential fix.

[@alfvicente]

You don't know how much I thank you. I fixed my 451+ with a 80 ohm, 0.5w resistor on pins 1 and 8. It measured around 2.36v originally, and with the resistor is doing 1.37v. Now I can recover my files!

[@vanlam3892]

You totally saved my butt. I put a 100 ohm 1/2 watts resistor (that's all I can find) between clock and ground and it worked! All data is intact and learned to my lesson to start backup the data. It all started with a fan malfunction overheat warning. After I shut down and boot it backup, the fan was spinning fine and then I got all red LED. I even tried replacing the fan and it didn't help. Thank you so very much for your video and showing the pinout. I have a TS-451+ and it has 9 pins header as shown.

[@kirovoleg]

Thanks for this video. I did this to mine in december 2020 after it died. I didnt trust it after so I moved the critical stuff to a Nas I made using an old pc and use this one for redundant backups. It has been over 3 years now and it still works fine!

[@vittoriocalzolari4449]

I want add my gratitude for this video that has been very helpful to keep my TS-251 alive!. One week ago, my NAS failed to boot and I was not able to access it anymore. Looking into the internet I found that video. I didn't want to believe that was my case, but the behaviour of my NAS was the same. I didn't have an oscilloscope to check for the clock spec, therefore I did the modification using a 100 ohm pull-down resistor and it worked well!. Thank you so much!.😀

[@timerking4016]

Thank you for this video. I woke up to an unresponsive TS 451+ this morning after getting a "System fan failed" alert email over night. Powered it down and back up again to be met with the 4 red LED's of doom. Did a bit of Googling and came across your video which showed exactly the same symptoms as mine. Connected a 100 ohm resistor across pins 1 & 9 on the LPC connector and I now have a functioning NAS again. Cheers!

[@bmc622000]

Thank you for the detailed video. Came home from work yesterday to find my 653 pro in "System Booting". Status light off. Blue usb on steady, and flashing ethernet. Drive bay lights were red. Checked voltage and it was high, so wacked a 100ohm resistor on pins 1 to 8. The pro doesn't have the posts so soldered it directly to pads. Tested and it fired back up. Put it all together and is back in business.

[@bobbythchou]

thank you for your video, thought i bought a brick ts-451 $30, followed your video and revived it. now have a good 4-bay nas for $30, awesome deal.

[@marcusmuellerhandy]

and is it still alive today?

[@konstantinostsogkas2692]

Thank you my friend! The fix works absolutely perfect for my 451+. Your videos shows exactly every detail that need attention. Bravo!

[@mikevadnais7722]

Did you use a 1/4 or 1/2 Watt 100 Ohm Resistor. Mine just died last night, trying the fix. Thanks in advance

[@konstantinostsogkas2692]

@@mikevadnais7722 1/4 watt and worked very smooth. I don't know till when will this work, but for the last 20 days it has no issue. Maybe you should try a more thorough inspection with an oscilloscope, as the author of this video suggest. Really sorry hearing yours "died"...

[@mikevadnais7722]

@@konstantinostsogkas2692 Thanks for the response. I don't have a scope. I use this NAS for my Exterior Cameras. I bought a TS-251D for my other NAS, works great and will probably get another one to replace this one for the cameras. If I can fix it for 5 dollars and it goes another year or 2, then that would be great. I was just concerned my drives were gone when I first saw the issue. Thanks again.

[@elodiecemoi3057]

Hi, I confirm that a 100 ohms resistor, soldered between Pin 1 and Pin 8 of the motherboard black connector, did solve my problem immediately ! My TS-851 is up again and I am backuping my data (those that I had not previously saved) to other disks. This

[@abhijithnaidu]

Did you upload the video ?

[@elodiecemoi3057]

@@abhijithnaidu yes I did, and I have added the link showing the pins for the resistor soldering: do you have any problem to watch it ?

[@ricksface]

The failure on my TS-251+ was the high side. Adding a 100ohm resistor did the trick. Thank you so much!

[@matte8822]

Thank you! I hope it last. But thank you, we need more people like you. Happiness is real when you share.

[@SteamShrubs]

Thank you, I managed to bring my TS453 back thanks to your video 💪 I saw on other forums that you had to target around 1.7V. With no resistor installed and powered up, pin 1 & 8 was reading 2.34V. Installed a 75ohm resister between the two and it brought it down to 1.2V. This brought the LED indicators back to all green but was stuck on system booting so that failed. The 100ohm brought it down to 1.4V and got the same issue, just kept on system booting. The 120ohm worked for me, brought it to 1.55V so closer to the target 1.7 ideal. Got my data off the NAS, phew 😮‍💨 I also read that if the voltage read less than 1V then to stick the -100ohm between pin 1 and pin 6 instead, so theres that

[@VTNiceguy]

Much obliged for this video and I +1 your rant. I tried the same fix (100 ohm resistor across ping 1 & 8) and it worked like a charm. I'll not buy Qnap again and have started research building my own homeNAS. Thanks!

[@OmahaCelebration]

Thanks for your video. We were able to follow your directions and we have resurrected our dead NAS. Blessing on you!

[@awolfe63]

This worked for me! Saw the same signal on the scope. Soldered a 100 ohm resistor between two female pin connectors and jumpered pin 1 to ground with it. Everything came back. I will retire the unit and replace it - but still a big help.

[@LarsDunemark]

Used multimeter to check between ground and LCKL and got 2,3V added a pull down at 100ohm between LCKL and ground and my device started to boot again. Thanks for a great video.

[@JamesMetcalf77]

You are a scholar and a gentleman. $5 and an hour of my time just fixed my TS-251.

[@mikevadnais7722]

James, what wattage did you use for the resistor? 1/4 or 1/2 watt. I see Amazon has both. Thanks

[@JamesMetcalf77]

@@mikevadnais7722 I used the 1/2 watt.

[@mikevadnais7722]

@@JamesMetcalf77 Thank You, just ordered them from Amazon.

[@JamesMetcalf77]

@@mikevadnais7722 you're welcome. It will take you at most an hour to disassemble, solder, test, reassemble.

[@stephanej30]

My 451+ just went, same as you. All RED LED. i followed your video and it did fix it. Thanks again for sharing this.

[@davidames1351]

Just fixed my TS-251 with the resistor connected to LCLK and ground. There is so little space on the 251 between the pins and the chassis when the mainboard is fitted so I had to bend the required pins 90 degrees to get the resistor in once the main board is fitted to avoid touching the chassis. In fact I had to completely dissemble the NAS to get anywhere near the pins. I don't have a scope so I tested with the board out, going for ground first which worked. I also used Dupont connectors to avoid soldering to the board, plus easier testing. These of course, as above will not fit without carefully bending the identified pins through 90 degrees. Many thanks to powerevolutions as I was on the verge of spending £350 on a new NAS.

[@powerevolutions]

At 2:56 time mark in the video the pinout is shown in the lower right corner. Look for the missing pin to identify the ground, +3V3 , and LCLK pins from the diagram. You will be connecting one end of the resistor to the LCLK pin lower right corner, and the other end to either the GND or +3V3 pin on the top left 2 pins. It depends on which part of the clock driver has failed as to which voltage level you need to pull the clock pin to. So there is some experimentation you will need to do unless you have a oscilloscope to view the LCLK waveform with. I have seen reports of failed units with the top portion of the totem pole driver blown as well as the lower side. Best to just connect it one way and power it up to see if it boots then try the other way, if you don't have access to a oscilloscope. Good luck.

[@rainerbeddig2619]

Thank you, someone in a qnap forum pointed me to pins 1 and 8 which actually worked fine for me. immediately solved the boot problem. Hope it will stay like this for a while.

[@SeanSR]

CAN WE GET AN UPDATE VIDEO WITH A CLOSE UP OF THE PINS TO SOLDER TO?

[@BarryStacy]

@@SeanSR That would be very helpful.

[@jimakeson9877]

Here is some additional photos that may be useful for people. thank you for all the work you did: jim.akesons.com/projects/qnap-ts-451-repair

[@powerevolutions]

@@jimakeson9877 Thanks for posting. Every bit helps for those that are hitting this problem.

[@Do_Wop]

Thank you!! Your research and solution helped me restore my NAS.

[@wozpinball]

Thanks for your excellent video. I really appreciate that you put the 'scope on the pins so we can see the effect. My TS-451+ crapped out yesterday (I thought it was due to the eclipse - it wasn't lol). I didn't have a 100R resistor available, so I used a 150R, and that didn't work. I had a 1K trimmer available, which I adjusted to 100R, and my NAS is back in action! While I had the PCB out, I changed the battery and upgraded the RAM, so I'm hoping it will be good for a while. Thank you!

[@mathieujacoulet7318]

Thank you, you and your resistance make my day ! My Ts-451+ is back on track :)

[@johndunleavy]

Another happy viewer has resurrected his dead TS-451+. 100ohm to ground did the trick. Thank you, thank you thank you!! Mine failed on Friday. I ordered a new TS-451+ before finding out about this issue and successfully migrated the disks into it, so I have my NAS working already. I now have a backup unit which I/m considering populating with disks as a backup backup. I found the original 2gb sodimm I swapped out for the Crucial 8gb upgrade in 2016, so now have a 4gb unit as the 8gb is in the new one.

[@powerevolutions]

Update on the repaired unit. It has been working for close to 8 months with the resistor fix and hasn't shown any other problems. On another note, be aware that QNAP along with other NAS driver manufacturers have experience a lot of problems with their security and ransomware. Make sure to update to the latest firmware versions and install security check software and virus scanner, and disable the Admin account to reduce the chance of ransomware encrypting your files.

[@arankaspar5165]

I prefer Synology to QNAP for security and interface.

[@SeanSR]

Can we get a close up of the pins, mine is not missing a pin

[@powerevolutions]

@@SeanSR kzbin.info/www/bejne/i5bMoZuLbJiomNE

[@TheGoodOldDays-IsNow]

Is it still running or did you decide to bin it after a time?

[@powerevolutions]

Still running still not trusted lol@@TheGoodOldDays-IsNow

[@pacart1]

You saved me £140 with this video. Qnap RMA for shit. 6p 120 Ohm later and NAS back up and running. Big Thanks.

[@prisonwallet]

I haven't tried this yet but a development QNAP box just did the same thing. I am going to try this when I get home. Thanks for the video!

[@dborne]

Another happy viewer saying, "Thank you!" The pull down resistor revitalized my box and I'm pulling all of my data off of it now. No more QNAP products for me.

[@mikevadnais7722]

Thanks again to everyone that responded to my post. I got my 100 ohm resistor from Amazon today, and the QNAP TS-251 is up and running great again. If it saves me buying a new one for a year or two, the 5 dollar fix was well worth it. Could not just order one resistor, they came in pack of 10 :)

[@matte8822]

Hi could you link the product you bought?

[@chowielin8785]

Thank you! Fix worked and brought voltage down between p1 and p10 from 2.3v to 1.287v and it all works now!

[@petergordon4666]

Thank you so much for this. My ts -251 is no longer a brick. Sadly I did buy a new unit before seeing the video.

[@flmk974]

Hi. Mine was a high side totem pole failure. So, I put a 100 Ohm resistance between pin 1 and 9 and it worked like a charm. Thank you so much.

[@andrewlewis6975]

Thank you for posting this - it saved me from selling my NAS for parts.

[@mikevadnais7722]

Does it matter if the resistor is 1/4 or 1/2 watt? My TS-251 died last night with all these same symptoms.

[@karlkemp5798]

Thanks man! You saved my QNAP and my data ! 100 Ohm resistor did the trick.

[@dre2004]

Awesome tutorial. Your explanation just gave my TS-453+ new extension of life. I ended up using 110 ohms for mine couldnt find 100ohms for my jungle fix. seems stable so far. Mega Thanks

[@abdelghanitup9558]

hello dude, i want to ask you i have the ts-453 pro and he stuck in system booting if i solde a 100 ohms in 1 and 10 pad pin it will be work?

[@dillardblom3312]

Thanks for this video!! Had this issue two days ago with my 453 Pro, now awaiting resistor to arrive and then start sweating to get the fix in (hopefully)

[@mcal27]

Just happened to one of my 451+'s... I bought a new 451+ and dropped my drives into it..it also has the sys fan error!! So Going to fit the 100ohm resister to my original 451+ and try the replacement with a couple of fresh drives to see if it still has the sys fan error which is often a symptom of this issue... Thanks for the video

[@zockfreund]

Thank you very much, I had exactly the same error. It is a joke that the company Qnap has not made a recall.

[@guyteigh3375]

Yep, and once the news starts to spread that they KNEW about the failure and carried on sending out kit they KNEW would die, I am guessing they will find they made a VERY poor judgement call.

[@RemyDelaCruz]

yup, I lost my trust in them. I could have sent the board, pay my own shipping for a fix. I'm an IT guy, not a hardware/engineer. They could have kept a trust link between them and their customers. But this is a FU to our faces. I will revive mine but will be looking to migrate to another vendor if I don't come up with my own solution. edit: perhaps this was intel leaving them on their own. who knows, but they could have done something about it.

[@DJ_Megahertz]

I have these words : CLASS ACTION LAWSUIT!

[@RemyDelaCruz]

@@DJ_Megahertz a PR nightmare that could have been avoided by asking their customers to meet them in the middle and blame intel in the process. I am waiting for my Synology to get home! Got a good deal on it.

[@wutj2012]

Thanks very much for the instruction video. I had the exact same problem with my TS451+ and the resistor fix worked. Not sure how long this will last, I will get a external hard drive to backup the stuff in my NAS periodically.

[@MittNamnVarTaget]

Soo many thanks for making this video! Fixed my TS-453 pro.

[@MrMarosh123]

Your research saved my data. You are a very clever man, respect. Thank you.

[@powerevolutions]

Glad it helped out...I wish I could take credit for it, but this is just a collection of information that others have put together.

[@arankaspar5165]

This was very helpful. My header on TS451+ has 10 Pins. PCB is labeled 1 and 6 on the front (led/button side). I put two 220 Ohm resistors on pins 2 and 10. One 220 Ohm wasn't enough.

[@Zeceer]

Thanks a lot for this video. Let me add my self to the list of non boot to full boot. Works perfectly!

[@pwolfamv]

My TS-451 just died, same symptoms you described and showed here. I just ordered a new TS-451D2 to replace it but this does give me some hope of at least getting the broken one up and running again. I should have a 100ohm resister laying around somewhere and will give this a try, thanks.

[@pwolfamv]

This worked. Thanks for the video, very helpful!

[@siaghorbani9389]

Another TS-451 was saved because of this video!

[@ytdemori]

Hi, this solution has partially worked for me… I used a 100ohm 1/4w resistor on pin 1/8. Now the nas boot (451+) but two leds are still red.. first two before the power button… there are other things that I can do? Just to be clear, I’m able to boot the nas and I see the user interface with hdmi connection (the boot time is quite long… around 8 minutes…) but two leds before the power button remain red…

[@gosztomfoto]

I did the same with my TS-251 and it works again - thank you!

[@DenHvideHund]

Great video. Thank you for doing this. A few questions though. 0,25watt or 0,5watt resistor and will metal film resistors be ok ?

[@powerevolutions]

either wattage will work but what you are looking for is a small 1/8 or 1/4 watt carbon low inductance resistor. The bigger you go on the physical size of the resistor the more inductance you will add which will create more ringing on the edges of the clock waveform. The most the pin could supply in power is ~0.1W not clocking so 1/8 or 1/4 watt is ok. When clocking it will be ~0.05W so pretty small.

[@DenHvideHund]

Thanks..so a metal film resistor is also fine ?@@powerevolutions

[@powerevolutions]

@@DenHvideHund metal film resistors will be ok

[@erikzorzin]

This guy saved my life today! I had this problem: one blue and two red lights on, silent HDs, all dead. I have a TS251 QNAP NAS, the motherboard looks the same of the TS451. I put a 120 ohms (I didn't have a 100 ohms) resistor as he did (better shown here: kzbin.info/www/bejne/i5bMoZuLbJiomNE) and voilà: now it is back to life! Thank you veeeeeery much :)

[@juanpa74]

I have the opportunity to buy a second hand tS-451+ at good price. Should this resistor fix be done preemptively or just wait till it happens? Seems @powerevolutions fix has been working for almost two years.

[@powerevolutions]

Wait until it fails. Adding the resistor may hasten the failure, and cause it to fail such that you need to change the polarity of the resistor connection. Knowing the failure will occur eventually, I would hope that you get a good deal.

[@robertuhrikpersonal]

new repair tip - after using the nas with solution from this video (resistor direct soldered on pins) for a while it stopped working - I have few hours played with that - and have researched - that when cabled out to breadboard for splitting the signal for oscilloscope and quick resistor change - it works every time. also that has lead to probe the resistor soldered with double breadboard wire addon - which was not working - but when the wires were apart it has again begun to work - also the solution is - solder the resistor on each side on single breadboard wire (cover with heat shrinkable tube to protect agains shorts) and lead the wire with resistor included like one string around the nas motherboard - from one ground pin outgoing, under the board, to other side incoming to the clock pin - IT WORKS AGAIN ! :-) (please, who can explain ? what does the additional wire ? what it act like ? a capacitor ? a magnetic field capacitor ? or what ? because of the fact that when the wires are together, it doesn't work... the frequency must play a role there...)

[@ultrafilipsz.5827]

Thank you for a good video, I've come from a reddit post ("Warning - Many QNAP NAS are dying due to a CPU bug known 2 years ago"). TS-253 Pro (probably produced: 2014) that i rescure from the trash is working again. before logic high was 3,5V and low: 1,4V. I added 91R puldown resistor, and high is 2,9V and low 0,5V and It's working again. I gonna see how long it will last and search for a better solution than this, because those values balance closely to uncertainity voltage levels for CMOS

[@user-re7cq3wy6r]

Yesterday in the middle of the night Ts-251 started humming. No response to buttons. I disconnected it. In the morning after turning on the power, the red diodes are red. Probably purchased in 2016 and operated 24/7. Very nice Intel. Have you planned this?

[@LeFPhiliP]

How long did this fix work for you? Did you ever test adding your own clock? Thank you for you excellent content.

[@powerevolutions]

Still working. Haven't needed to try the external clock yet.

[@mcbrite]

Weird: I found the LPC Interface, but mine does NOT have a header soldered to it? Just the little shiny dots that a header would go on top of? Can I just solder the resistor to thiose dots? I also have a handheld mutimeter, pin 1 to 8 (in video above: very top left to almost bottom right on the header) measured 2.42V. Nas is from 2015 and only failed 2 days ago... Any tips on what else and how I could measure with my multimeter to confirm I'm on the right path? Thanks for the video, you're a life saver! PS: I have 100 Ohm 0.25 Watt resistor in the mail to me...

[@powerevolutions]

If the header wasn't populated, but the holes are there, then it should be easy to solder a through hole resistor in place. Just keep the leads relatively short. The silkscreen location on the board should indicate which side is the component insertion side for the header. This puts the pins in the correct orientation from what is shown in the diagrams when referencing it. If you are getting about 2.42V, then a pull down is required. Just double check against what is shown in the videos for pin locations. Good luck.

[@chimeranzl9147]

I have the TS451+, slots 3 and 4 appear to no longer provide power to the disks. Slots 1 and 2 are ok. Any idea?

[@charlie4889]

Thank you! Your fix worked perfectly for my TS-251+.

[@sprokies99]

What was the symptom of your ts 251+ ? Got one which is only picking up drive 1. Seems like drive 2 port is gone or something...

[@charlie4889]

@@sprokies99 Neither drive was accessible. I couldn't access the system interface at all. Fan was running full blast. There was a red light on the front panel. It has been running fine since applying the fix.

[@singhparambir]

Great video. Thanks. Is this the problem with all T451+ or only the ones that came back in 2016? Mine is 2019 purchase.

[@powerevolutions]

Looking up the unit on QNAP site, it says it still uses the J1900 processor, and there isn't any documentation that I have seen yet that says the bug is fixed in the silicon, though I think I saw something about them doing some stuff in the firmware to mitigate the LPC failures to increase the time to failure. Guess you get to roll the dice.

[@theblkghost]

Buyer beware indeed. Thanks a mill, this fix works on my TS-251+ but I still find it a bit surreal.

[@jorgenk2662]

Thanks for posting this! This fixed my TS-451.

[@AveryBechtel]

Thanks for the video! I assume if I have 0 vDC between ground and clock, it's dead?

[@powerevolutions]

Sorry, but likely true...best confirmation is to put a scope on it to see if there is any signal present even in the millivolt range. If you have absolutely nothing there, it may be the case that the processor is not coming out of reset or it is a dead short to ground which is beyond what this the video steps through for a fix. Sorry

[@bwreil]

Thanks for this. It worked on my older TS-251 like a charm.

[@pascallachance5217]

TS-453A with board QX85 REV1.3 here. I tried 100ohm 1W and 1/2W from pin 1 LPC to pin 8 Ground, I tried same between Pin 1 and +3.3v, No go. Getting 1.32v between pin 1 and ground without resistor. Screen shows System Booting, no other lights come on the device with or without the drives in. Any thoughts ?

[@powerevolutions]

If you are getting to a system booting screen, then you may have some different issues going on. Put a scope on your clock line and look at its low and high voltage values to see if they are within spec and try to tweak the signal with resistors if not. I have not heard of anyone with both high and low side transistors failing yet. It seems once one side fails in the push-pull outputs, it looks to reduce stress on the other switch.

[@pascallachance5217]

@@powerevolutions Mind to share with me what the voltage should be betwneen Pin 1 - Pin +3,3v, as well as Pin 1 - Ground(Ping 8). Thanks.

[@powerevolutions]

@@pascallachance5217 The Intel LPC specification calls out that a logic low is a maximum voltage of 0.8Volts and that the logic high is a minimum voltage of 1.5V, so if your clock is less than 0.8V when low and more than 1.5V when high, then you should be ok. This is why you need an oscilloscope to view the clock signal. This cannot be measured with a digital multimeter. We are able to make assumptions about what part of the totem pole driver has failed by using the digital voltage meter, but if the 100R does not work, you really need to look at it with an oscilloscope next or do what some others have done by using trial and error which carries its own risk of further damaging the output.

[@pascallachance5217]

@@powerevolutions Thanks, This is valuable information. I ended up calling Qnap and talked with a really good tech. He acknoledge the issue with the intel chips. Luckily I have a new TS-X53D which I use for myself and he explained me the process to swap the drives from the defective 453 over into mine without messing up the raid on both the clients qnap and mine. Of course I backed up my qnap before going forward with this attempt. I will report back in a bit here, Im just about to make the attempt.

[@pascallachance5217]

@@powerevolutions SUCCESS ! I was able to move the drives from the defective qnap over to my TS-453, re-flash the firmware to update the hard drives to latest OS firmware, punch in my decryption key to unlock the drives, all files were available immediately !

[@talman7513]

Thank you so much ! amazing help to solve the clock issue. You saved my money and my files !! Great thanks ! it works fine.

[@D2.5020]

Thanks so much. I shorted the 1-st and the 10-th pin with 100R resistor and 453s works again.

[@MrBroly10000]

Can you tell which CPU you have? I've read Intel fixed this with Stepping D1 on the J1900 but I haven't found any info on what that looks like with CPUINFO. This is what mines shows model name : Intel(R) Celeron(R) CPU J1900 @ 1.99GHz stepping : 9 microcode : 0x90a

[@powerevolutions]

If it is a qnap they say to either open the control panel while logged into the nas drive and the CPU type will be listed in the top seciton under system status or go to their website and search your model name and look at the hardware specifications.

[@MrBroly10000]

@powerevolutions CPUINFO shows the CPU model. What I'm curious about is what that Stepping 9 means. Can't find any information on it.

[@powerevolutions]

You will have to chase down the documents with Intel. I only went as far as this from one of their PCN's. You will need to read their documents to understand what the microcode changes do --> Summary of changes of the D1 stepping: 1) The D-1 stepping CPU ID will remain the same as the D-0 stepping. a) The CPUID will report the processor as a D-0 stepping. D-0 and D-1 stepping can be differentiated by reading the Manufacturer ID (PCIE_REG_MANUFACTURER_ID) register field - [B:0, D:31, F:0, Offset:F8h, Bits 23:16]. D-0 stepping processors will have a value of 11h and D-1 stepping processors will have a value of 13h. 2) The new D-1 stepping will be physically and electrically drop in compatible, no change form and fit. 3) Microcode Compatibility for D1-stepping Intel® Atom™ Processor E3800 Product Family and the Intel® Celeron® Processor N2930, N2807, J1800 and J1900. a) As listed in the Identification Table in the corresponding NDA specification updates (RDC# 539130 and 572021), microcode update (MCU) M0F30679909 (or later) should be used with D1 stepping processors. M013067990x microcode updates, intended for D0 stepping processors only, may work with D1 stepping processors but this combination has not been validated and Intel recommends customers to use M0F30679909 (or later). 4) Please see additional changes made in D-1 stepping listed in the Intel Atom ® Processor E3800 Updated documents RDC# 539130 and 572021.

[@alexanders.6080]

Man, I was able to purchase this in 2022 and still got this problem!

[@u-n-i-t]

Thanks for your work. My QNAP-451 stopped starting 2 years ago. I thought to give it into repairs to a private master. But the search for a good master dragged on. And so I remembered about QNAP-451. I accidentally found a message on the forum and went to watch the video. The voltage on the contact was 1.9V. Put the resistance of 100 Ohms. And he works again. How much time does your QNAP work after repair? Maybe it will be better to change the CPU?

[@powerevolutions]

It has been working since early 2020 when it failed with the LPC problem. So still working and still not trusted.

[@u-n-i-t]

@@powerevolutions We can only hope that it will work for a long time. Thanks for the answer

[@u-n-i-t]

@@powerevolutions What if it stops working? Change CPU?

[@powerevolutions]

@@u-n-i-t If it fails I will do the clock injection, and if that fails, I will E-waste it. The technology is getting a bit long in the tooth so not worth putting a large amount of effort into it since a cpu replacement would just mean going through the whole failure process again. Better off to buy a new NAS drive without the bad silicon.

[@erkme73]

@@powerevolutions My brother is an EE (FPGA dev) and his first comment was to add an asynchronous clock injection. I suppose the original signal will have to be so muted as to warrant that effort - and to prevent conflicts? I'm hoping to get a few more years as you have pulled off. THANK YOU!

[@andreasreitan7087]

Would be nice with some instructions how where to exactly the resistor shall be placed.

[@tonyskarich8386]

One tip for not having to reassemble everything, just put the HDD tray on bottom (heavy) then the mainboard upside down on top, plug in fan, plug in cables and run it to copy all your volumes. This way you get good cooling and won't risk busting the resistor if it can remain out in the open.

[@tonyskarich8386]

Also i can confirm it works with 117.5 Ohms as well....I didn't have 100 Ohm so I paralleled 4 x 470 Ohm resistors. 1/4 watt. So it can handle 1 watt lol.

[@tonyskarich8386]

TS 251 original 2 bay circa 2014

[@dahmerd]

Thanks. I am still working through this issue now. I have engaged with QNAP....but who knows what they will say. Would female pin connectors connecting the two pinouts accomplish the same results or must you use the resistors?

[@dahmerd]

Told by QNAP that my issue sounds like a hardware issue and the product is end-of-life. Goodbye. WOW. Yeah, I'm eager to give them more money with that kind of customer support.

[@powerevolutions]

You can add a female header too the resistor soldered on. You just have to keep the leads short on the resistor.

[@kapoios79]

Thank you for this video. It describes my problem exactly! Quick question, do I need this resistor 10EP512100R or this one 10EP514100R?

[@powerevolutions]

Use the 10EP514100R 1/4Watt and keep the lead length short to minimize the inductance added. Good luck.

[@kapoios79]

@@powerevolutions Thank you so much! :) I'll let you know if it worked!

[@kapoios79]

@@powerevolutions Thanks again for this great video and assistance. My NAS is operational again! now to deal with the qsnatch malware that I had no idea I had :(

[@virtualworld-01]

Does other NAS's LPC port has same pinout? I have a Thecus N5810 which has J1900 and stopped working.

[@powerevolutions]

Sorry, I am not familiar with that drive and can't comment on the lpc port. Any pictures of the main board that I have found don't really show if that port even comes out to a connector. Perhaps someone else can comment if they know.

[@AndreaDeTogni]

Hey! Thanks! I tried this fix. It does work, but only in some weird conditions. If I solder or connect the resistor to the pins, it does not work. Instead if I use a longer cable, no luck. So basically I used a jumper cable to connect the resistor to the pins and it was working. Then I soldered it, not working. I tried different configurations of long and short cables and it works only with a long cable. Any idea? Ps I tested continuity and it was OK. I haven't however tested voltage

[@powerevolutions]

A long cable is normally a really bad thing for a high frequency clock. My guess is that you have added enough additional impedance to make the total impedance higher. Can only imagine how distorted the clock signal must be with the added inductance from the longer cables. Maybe try a larger value resistor and go back to the header connection without a long cable.

[@AndreaDeTogni]

@@powerevolutions thanks. Unfortunately yesterday I made a mistake and I connected pin 1 with 10 and now.... It does not even come up in any way anymore. The voltage between 1 and 8,which previously was 2.35,now it's 0. Do you think there is a way to recover it? 😢

[@AndreaDeTogni]

I have to correct myself. The board works. It's just that by coincidence the power adapter came slightly out from the power plug and that was the reason. I'll try with a higher resistance today.

[@Hayatory]

@@AndreaDeTogni Did you try a higher resistor?

[@AndreaDeTogni]

@@Hayatory hi yes I tried with several different resistors with higher values. Still, never works. It works only with the cable. Therefore I suspect that the additional induttance introduced with the longer cable makes it work. But my electronics studies are very rusted so I don't know the reason, only the fact that does work only in this way

[@peterneiss7284]

Thank you very much. I can confirm a 100Ohm resistor between GND and LClk solved the issue with a TS451U (Rack mount version). The connector is placed at a different spot, but is also labeled LPC-CN1🤑

[@merags1978]

one more success story - 1/4w 100ohm resistor across Lclk and Gnd did the trick for me. Thanks!

[@paolopanzeri9632]

I put the resistor and now get 1.7V on the pin. The four red leds now disappear but my TS253 PRO not boot (i can’t hear the beep). What do you think ?

[@powerevolutions]

Always tough to diagnose without seeing signals with a scope. There are other instances of contamination of inter-board connectors which may affect things too. You could probably get some Isopropyl alcohol to clean them and re-assembly again.

[@32_bits]

Excellent and thank you for posting this. I have a TS-453 pro and although the header and IO IC are in different places it was not hard to find, with the LPC at the top edge of the PCB but with no pins soldered. The 97 ohm resistor goes between pad 1 and pad 10. My NAS is now working again. (-:

[@abhishekthomas85]

@32bits I have TS 453 I did the same solution with 100ohm with pin 1 and 8 but system didn't not is there a different pin which I need to put on resistor

[@abdelghanitup9558]

@@abhishekthomas85 did you fix it i have the same problem like u i place 100ohm resi and i got 1.55 v not 1.7 maybe we need to change it to 95 or 97 ohm iam not sure

[@asfan42069bz]

Can you post a video of how to solder it in? I have a 251 with the same errors. Maybe a link to the 100ohm resistor that everyone got.

[@asfan42069bz]

I watched it again and I don't know exactly where to solder.

[@bornlibra23]

I have a TS-251 but no soldering skills. I opened my NAS up & have the 9 pin LPC header in the same corner as the board in the video. Can you please suggest any way out for me?

[@powerevolutions]

If you don't feel confident enough to solder, you can practice before trying it. It doesn't have to be pretty, it just has to make a good contact. The other option is to find a friend who is confident in soldering or take it to a repair shop for them to do. Good luck.

[@bornlibra23]

@@powerevolutions Thank you. I will take it to a repair shop. But cant I just use a clamp to connect the resistor while I copy off my data?

[@kennethchan1986]

Quick question. Can I just connect the resistor or does it need to be soldered.

[@powerevolutions]

It doesn't need to be soldered if you are just testing to see whether you need a pullup or pulldown. However I would recommend soldering if it is to be permanent because vibration and oxidation will affect the connection over a period of time and cause clocking errors since there isn't very much signal margin left. You can probably buy a receptacle header and solder the resistor to it instead if you are worried, then plug it onto the 0.1" pin header for the final fix if it allows the NAS to boot up.

[@kennethchan1986]

@@powerevolutions do you have any links to videos to show how to solder to pcb receptacle?

[@powerevolutions]

@@kennethchan1986 Sorry I don't. It should be relatively straight forward to purchase a female header like SSW-105-01-G-D from samtec and solder the resistor to the exposed pins that correspond to the pullup or pulldown location shown in the video. Soldering itself is not hard to do if you have a proper soldering iron and flux to help the solder flow.

[@MrSteveSimons]

Hello there! Very nice video. I have a QNAP TS-251+ that works for for now. Can you please tell me if the failure would eventually be that the nas would turn off by it's own and would boot up with all red lights, it will the drive slowly will give red lights before all dying? I ask this as I have read some other people speaking about this and saying that it might start with a single drive failure and I can't understand on how to understand if it's simply really a disk failure or a nas failure. Plus to this they say that it should be a transistor failure in the drive pcb board that could be simply replaced, so completely different from your fix. They you in advance.

[@powerevolutions]

Sorry I am not sure about the other problems that might exist with these nas drives. The LPC clock failure is one of the dominant failure modes to date with that generation of processors. Knowing what the LPC is doing, I would not think a single hard drive failing would indicate a LPC clock that is about to fail. As for a single transistor failure, I haven't heard about that one yet.

[@davetunstall87]

Legend, thanks so much for this video. Back up and running 🎉

[@almostcool9216]

Thankyou powerevolutions it worked for my Qnap TS-253 Pro and just a hint after you hook up the 100 ohm resistor you have to wait a while before it starts up ....mine flashed LEDS and then died and after a while came back to life

[@paolopanzeri9632]

What pin you use with resistor ?

[@erkme73]

another me too comment. Mine was purchased in 2016 and died this morning. I only had two 220ohm resistors in house, so I put them in parallel. Worked great. QUestion to @powerevolutions... It's been three years since you fixed yours. Is it still going? Any suggestions on a replacement that won't have the same issue?

[@powerevolutions]

It is still running...I don't use the usb which I think was also affected by the same degradation issues. The recommendation is not to leave anything on it that you can't lose. As for replacements, I don't have any suggestions myself. I just backed up my stuff elsewhere on SS drives and just use the NAS to share data amongst my machines now.

[@martenbutow2374]

worked perfectly on my TS251+ Thank you mate!

[@mikevadnais7722]

Does it matter if the resistor is 1/4 or 1/2 watt? My TS-251 died last night with all these same symptoms.

[@powerevolutions]

Keep it as small as possible in physical size. 1/4 watt will do ok.