XBOX One Light of Death - Bad MOSFET and power regulation circuitry - Diagnosis and Repair

This video covers the repair of an XBOX One games console with an issue where it powers on then off after around 1-2 seconds, otherwise known as the Light of Death.
In this instance it was caused by a blown N-Channel MOSFET, faulty power regulation circuitry (U9D4) and associated surface mount components.
In this video we cover the diagnosis of the faulty components, their replacement and final testing of the console post-repair.
Associated Materials:
==================
Toshiba TPN8R903NL Power MOSFET (N-ch single VDSS ≤ 30V) Datasheet:
toshiba.semicon-storage.com/i...
XBOX One Standby Voltages Diagram:
drive.google.com/file/d/1Ayb5...
Thanks for watching and please remember to comment, rate and subscribe! If this video proves useful then if you can let the beginning / end ad(s) play through then that would be very much appreciated - it all helps go towards what I do here on this channel and keeps my content free to all.
Many thanks,
Andy.

[@fcdribblersplays9430]

Very nice to see people fixing things rather than throwing away. These companies should be made to help us fix our electrics

[@penkicker]

I love watching and hearing you explain andrew very much , it's nice to hear how much temperature you put , flux etc etc welll explained and keep up the good work

[@bobfairfield2227]

Nice work Andy, I had a power issues one that I had replace the Southbridge on and still no dice. Have just checked and I have the exact same issue as yourself but no visual damage apart from a tiny dot where it's started to burn! Thanks!

[@streetmech8026]

I love KZbin and all the smart people on it creating content. You great people have made me so smart.

[@DaneSaysStuff]

I have an Xbox One here with the same exact issue on the same exact phase. Your video is a huge money saved! Thank you very much!

[@lp37oh7]

This partially fixed my Xbox one issue, but it still shuts off at times. Good video! Keep it up.

[@GinjaBadger]

Your a electrictronics wizard. Thank you for these great videos

[@scottdugmore3420]

finally someone that knows what there on bout thanks m8 cant believe theres not more about this

[@nocturnal1one]

Awesome I miss real trouble shooting like this

[@jasonsandford2987]

Ive had exactly this happen to me yesterday and im going to check in the morning to see if i can rectify this issue, cracking video and hopefully thanks

[@vincentvine3721]

Very well done! Very professional

[@AndrewPaul]

Thank you.

[@jaxliel0779]

exelente su trabajo, lo sigo mucho desde colombia ¡¡¡gracias!!!

[@kylelee4209]

Love the vids your really in depth

[@saarike]

Nice job man!

[@dustindarland4373]

Excellent work.

[@nickb4766]

my xbox does the same thing and i finally found some one who actually had a video that told me what is wrong with my xbox

[@aftermath9751]

Nice video Andy ... my xbox did the same thing but i tossed it and got a new one after 2 people looked at it and had no clue what was wrong with it ..im sure this will help others with this problem ...keep the videos coming

[@AndrewPaul]

Cheers mate.

[@sosscarz]

you are great your videos are great and have clear instructions as to what you are doing great job. you got my sub and a like :)

[@AndrewPaul]

Many thanks mate :-)

[@rafacorrea2565]

Andrew Paul i have a question i have a xbox one s and it wont turn on i put my head next tobit and hear a buzzing noice can u tell me what to do

[@AndrewPaul]

If it's a One S I'd assume it should still be within it's initial warranty? Get it sent into MS if so don't be tempted to go alone when you don't have to. If it's not however then the only way to tell would be to open it and inspect for any obvious damage i.e. burned components and try a good PSU if all else fails to see if that cures its ails. You're rather limited unfortunately without schematics for this kind of problem when nothing obvious is to be found.

[@JakeyRofl]

Quality work!

[@Xboxflash]

Very good Andy

[@AndrewPaul]

Cheers mate.

[@-shotrry5185]

Xboxflash.ru Z. Z

[@BondarSam]

Кого встретил) англ хорошо знаешь?

[@samuel822007]

Ótimo vídeo amigo parabéns pelo trabalho! Aqui no Brasil também têm um cara muito bom! Manda mais vídeos de reparos em xbox one por favor! Valew!!

[@konturgestalter]

love your work

[@Evaldas65]

Great work. I was wondering what temperature on your soldering iron do you usually use in these kinds of situations?

[@kermitthegaminghermit8736]

It looks like the link to the XBOX One Standby Voltages Diagram is no longer functioning. Great video as usual.

[@woodchopper1572]

Dude this video was awesome! Great work and thanks for sharing. ✔

[@godchosenking79]

I just sub to you I can learn a lot for u you a good teacher

[@BodziuM]

what a great channel !

[@ravendrow83]

i have had to do this exact repair exact same mosfet and all

[@terrorninja]

Excellent job on fixing an xbox one great job on going step-by-step I noticed 1 smalle little details with this video Number R9E2C9E4 seems to be missing

[@keyall7532]

Great video!!! Though, what if you have the light of death, but everything on your circuit board looks totally normal?

[@forresttaylor6849]

Good job 👍

[@superfly8593]

EXCELLENT! ⭐️⭐️⭐️⭐️⭐️

[@AndrewPaul]

Many thanks.

[@Fixingthingz4u]

Great Job Andy but just remember when your measuring the resistor or the capacitor inline one or the other could be fine as they are both on the same trace you would need to pull each component of separately to correct test them :) but the other resistor in front of fet defiantly made sense that it was short that probably caused the fet to blow PS did you manage to find those ps4 parts for me ? Thanks Lee

[@tavros314]

Hey Paul , great video as always. Seems like the link to the XBOX One Standby Voltages Diagram is no longer working.

[@godchosenking79]

I love your video Andrew straight to the point good work but have a question all my capacitor reading 001 can another capacitor cause that problem please anything would help 😞😢😭😭

[@Saari36]

Hey Andrew, this video was really helpful in helping me troubleshoot, even though I found out the issue was completely unrelated. I'm wondering if you can give me some advice: My XBONE has the prepetual orange light no matter the power supply, so I took it apart to troubleshoot. I plugged it in without the whole thing put back together, and it fired right up. As soon as I plugged the WiFi card in, the Xbox died. I can run the Xbox without the WiFi card, but then I don't have wireless controller capability. I'm not saavy with electronics, and am wondering how I can test if this is an issue with the WiFi card, or an issue with the circuit board. Any input before I buy a WiFi card that may not work?

[@evilgerman8796]

Hi Andy, loved the video. I have an xbox that wont turn on anymore. I plugged another power brick to it and the light stays orange. there is no sound or light when touching the (X) button. I pulled my xbox apart since it's out of warranty and looked at the board. there are no visible signs of anything blown like in your video. I will be using your voltage diagram to check everything. Two questions: Is there a power LED on the board somewhere that lights up showing that i'm getting power? And in order to test the board (out of the case) do i need to have all parts connected before it will work? (I.E. -- fan/disk drive/Hard Drive/WiFi board, etc...) thanks.

[@gemmadutch3009]

Dear Andrew, What temperature settings did you use for air gun and soldering iron? Many thanks

[@ducky0069]

Great troubleshooting, observation and workmanship. I kinda do the same here at home as a hobby and enjoyed this video, as well the technique demonstrated. What causes this to happen overheating, bad fan heatsink, power surge, bad design?

[@shifty2755]

Usually a power surge.

[@benassy69]

Bradley Brown will be very happy now :P

[@pauljohns5447]

Hi Andrew, thanks for this great tutorial. Just a question for clarity please... It looks like the blob of solder underneath the larger chip that you replaced is spread out like a pancake and would short the pins along each side of the chip. Are those pins supposed to be apart or shorted? Thanks

[@VintageTechRepairs]

Yes they are all connected to earth

[@yebbo00]

Hi great video!!! I have exact issue here, I’m looking for a list to the components needed to replace? Would be a really good help thanks for reading and keep up the good work!

[@xiMoshyx]

trying to diagnoise a xbox one with the same issue. now i followed the troubleshooting steps and got exactly the same readings on each phase. now whats the bigger looking mosftet? to the left on each phase? Now my suspicions are because when testing resistance out of the 4 phases (revised board). The bottom 3 pins closest to the left give me a reading of 0.104v. The fourth pin furthest to the right gives 1.570v. The other 3 phases on the same pins of what I "think" are mosfets are 0 apart the fourth pin closest to the right which are also 1.570v. Am I right in saying they're mosfets or something esle? and my readings correct? Thank you. Its 4:50am and I feel I've learnt alot from you as per usual! thank you

[@Spartahhh]

Im subbed I’ll give this a shot if it doesn’t work for me Im not buying a new Xbox I’m going back to PlayStation fool me once but not twice Microsoft thanks for making this video I now have to watch tons of videos on how to work on circuit boards I’m a noob to this level of repair and won’t try until I am sure that I’m doing things the correct way

[@RaZZaR18]

I understand nothing what u do :D But looks very interessting! And at least great work Andy!

[@Lydia-jo9yx]

Finely I have found the problem.

[@andresb2834]

hello, good video, what about if the 3 pins on top and the four on top of the mosfet is beeping with the tester and beeping in ground also ?

[@Burchamj]

any ideas if it doesnt start up at all, tried 2 different power supplies, its not the outside power switch, and it happened after i removed the blu ray drive because a disc was stuck inside it, also sprayed it with canned duster.

[@slagdemon]

I'm having a similar problem with an Xbox one S model. I found that the fet on one of the phases was shorted open and replaced it. Now, instead of the board being completely dead, I get the startup chime, then it goes dead again. I have tested all 3 phases and the one closest to the power plugin area reads .637 and then I turn the leads around and it reads 1.937 when testing the leg of the fet to the resistor, whereas the other 2 phases read .637 and 1.967. All other electrical components that I've tested look and read normal, so I'm at a bit of a loss as to what could be wrong. Any advice or can you point me to a forum where discussions like this take place?

[@ttopsecrett904]

Thanks again andrew --Although i havent done this kind of repair before - this video will be very helpful ( dont forget to hit the LIKE BUTTON fellow viewers ) but before i burn up another 2 or three consoles --whats ideal heat when removing the capacitors ( Mosfets ) and what is the FLUX you recommend? Please keep the videos coming

[@joshallround]

I have tge same xbox with the same problem but only thing nothing is burnt everything on the side you did in this video is good i was wondering if you woupd have an idea to what else i can do

[@bashirkatune2788]

Hi great video!! I have exact issue here, I’ve checked the components for a burnt one to replace but all seem to be working. Do you have any other solution for solving this issue please?

[@eddieguerrero2414]

any recommendations on an xbox one that wont turn on? i have replaced the front panel and the board behind it and it still wont power on...?

[@XBlondeRebellionX]

I have a xbox one that won't power on at all im trying to diagnose and your videos are very helpful. I have a capacitor c9e6 above the first mosfet and resistor that's reading 210 ohms. All the others in the same position are reading 11 ohms. Could this be the reason for the no power issue? Thank you

[@romanjoske2537]

Hello Paul...would have any idea on the board to start looking for an xbox one that wont power? light stays amber the whole time...no evidence of blown anything on the board..thx.

[@paulhembry2333]

Hi tested my board and need a capacitor how do i find out what it is and where to get it thanks

[@peanutcharliebrown1983]

Your a life saver...... I had went oops upside it's head on my son's Xbox1 and when I went to plug it in I noticed a little smoke then I seen a red burning light cuming from the corner of the fan.... Well 09D1 was charcoal. Now I can repair it. Quick question. Can I get that component from my laptop motherboard? And where can I purchase the heat gun to extract the old damaged component?. Great job

[@mamupelu565]

How do you know what little component is ( capacitor, transistor...) and how do you know if it's gone bad? Measuring resistance? What resistance should they be?

[@xboxmodz22]

@andrew Paul I have found that the caps that are buy the power input will make these look bad and cause no power or turn on then off issues as well

[@AndrewPaul]

Good to know mate thank you :-)

[@xboxmodz22]

No problem i do have another that gets nothing at all but the link you posted to the XBOX One Standby Voltages is different from my board do you have the schematics for it? Here is a photo but you can see mine on the right is different ibb.co/f9FU5x

[@oscarfidelino9692]

@@xboxmodz22 i

[@lost_puppet1987]

this video worked for me

[@AndrewPaul]

Excellent news, glad I could be of assistance. Very nice work on your fix! 😃👍

[@lost_puppet1987]

@@AndrewPaul although during some time my power would go out while its on

[@royteterjr2113]

I have one in same condition as in the video where can I get the mosfet chip at

[@jamestompkins7816]

I was cleaning my Xbox and fan with dust off and I stuck a paper clip in to hold fan in place idk why I did that but seen some people online say to do that... then when I went to power it on it just turns on and off now. It won’t stay on. The dust can did spray really cold. Do you think it froze something

[@nezardafer1278]

thanks

[@Kroksas1]

got exactly the same, but unfortunately when all components was replaced, the only changes I can see that orange light stays on, when you press on button it changes to white for less then sec and goes back to orange, before was when plugged power cable no light on power brick at all. any suggestions?

[@liamoleary6238]

I know this is an older video but all my capacitors are reading at aprox 9.5 apart from one reading at 71 probably obvious but would that mean that all the capacitors are bad or the one that isn't close in readings from the others ?

[@whoisme678]

An old post, but have to say "well done"!! A good bit of detective work is what I should have said and I hope you show others with varying faults so as to give us 'computer butchers' a heads up. lol. Not really a computer butcher, but any fault finding or the steps of how you found your particular fault always comes in useful. Have to ask, is there a schematic for the xbox one as yet available.?

[@AndrewPaul]

Thank you.

[@paulstevens9971]

Andrew, any recommendation on fixing my Xbox One 500gb. I have the orange light on brick, bought two different bricks from amazon as that was the top problem from youtubers but did not work. Now, the machine does not light up in front. Any recommendations on what the prob would be or repairs shops in the US that could fix this.

[@exilasmos]

Excellent Video! I accidentally dropped my XBOX One S and it will not power on since. No lights, no fan spinning, it is completely dead! I tried with a different power supply but no joy. Is there a particular place in the motherboard that i should check? Or is it completely toast? Thanks!

[@ricor9358]

+Andrew Paul Hey do you have a schematic for these boards? how do you know what the measurements should be? Do you measure a known good board first to compare? Great vids mate!

[@AndrewPaul]

Hi mate, no schematics sadly though would make things a heck of a lot easier! Just comparing values from known good boards. :-)

[@ricor9358]

Hey thanks for the prompt response bro! Yeah I was hoping you where going to give me a different answer :P.... OK keep up the great work! One last question non related. I had one customers Xbox one and its controller wouldnt connect sometimes wasn't battery or controller it was board related. I am a bit confused as I have read they use a combo of wifi and rf for the controller's.... what board should I replace the rf or wifi? Is there a common fault for this?

[@nicknak2784]

hey Andy I have no idea how to do any of this kind of stuff and I have it any professional advice for what i should do

[@ShaneScott69]

I'm about to replace some mosfets on a broken xbox one s that I found on Facebook marketplace for very cheap and try smd work for the first time I'm not getting my hopes up with positive results but more of a lesson for myself , what's a good heat gun temperature to work with??

[@nikeshgupta8362]

Hi Andrew how's it going mate . V nice video I'm having something similar I have an Xbox one which works for 5 mins then it just shuts off . I have reflowed the APU but no change . Do u think the southbridge could be bad . All voltages test good when it's powered on and on stby.

[@AndrewPaul]

Might be worth a reflow on the Southbridge bud.

[@bmw330cisport9]

Hi Andrew great video can you help I have xbox one with no power I have tested the power rail and I get a high reading from the first big fat on the left H8318 D423P Q1lO but I don't have a working border to see if it should be the same as the other 4. Pls can you tell me if they all 5 should read the same. Ant

[@Rudynicolas]

@andrew paul how do you check u9d4 if it is okay

[@whoisme678]

well done.

[@AndrewPaul]

Many thanks.

[@simondr70]

I used a Boxmod and the Mosfet burned up would you be able to replace it ?

[@jerrybomcool]

I have an Xbox one original same to yours. I’ve looked everywhere and can’t find a single thing that looks bad. Used a thermal camera and only a few things light up. APU. Little bit of the chipset and the mosfets on the side (all normal apart from APU is hot in one corner. Not sure if that’s meant be like that?) my Xbox one is going white amber white amber (3 times as you said) and nothing else. Could this still be a chipset issue?

[@geovani60624]

hi man! the image with the power rails diagram isn't up anymore! can you please help me getting this diagram for the original xbox? I would highly appreciate it!

[@Inky2783]

Could you do a video for this same process on an Xbox One S/X?

[@YungDonDeNero]

Could you repost the diagram link to this if its still available. It would be much appreciated.

[@tayloralan91]

I'm getting readings from all the caps raising from 120 ohm and up. What Could cause them all to be bad on all phases?

[@friesofwisdom4399]

Your soldering iron is so big it made my eyes water XD the tip is like 3x the size of the mosfet you took off!

[@AndrewPaul]

Indeed - that pad acts as a big heatsink so you need it!

[@Lady_Royal777]

Andrew Paul - Hi Andrew, our xbox was overheating so my husband took it apart to clean it and replaced the thermal compound paste. The xbox one x now doesn’t want to turn on. It just beeps, light flashes white and turns straight off. Looking at the motherboard it seems like my husband has snapped off a couple of the resistors whilst taking off the heat sync clamp. This is the only thing we can think that’s happened as looking at the board they look missing/flat like they should be there but not sure if the board is supposed to be like this and something else may be the matter? Do you have any advice on how we could repair this problem we are experiencing please. We rang xbox support to send it to them for repair and they want £240, which we wont be doing. If you could advise us how to go about getting this xbox one x up and running again that’d be greatly appreciated thanks 😊

[@Brian-pk9if]

Mine is doing the same thing (it's a regular model),i have video on here showing what it's doing,or it seems like it's probably the same issue,i'm proud of myself for opening it up 3 times without breaking the ribbon wire on the front lol

[@joshallround]

I did everything in this video three times

[@lama8755]

i have a short on the 5v rail.how would you check the southbridge as all components leading to it look good

[@AndrewPaul]

Only way would be to lift the SB and see if the shorts disappear.

[@Lunayecks]

Hi Andrew. I have an xbox one S with the same problem but the serigraph is different to the mosfet of your video, since it is a one S. It is the component 4C50 (Q9D2) I do not locate the component. Do you know what your datasheet or name is? Regards. Sergio

[@ftl6664]

I have the same problem! Where to buy "4c50"? Have you found anything?

[@randomtube8226]

Remember when you have the console set to instant on under power settings. When you power the console down the light on the power supply will stay white. When you set the console to power save under power settings. When you power the console down the light on the power supply will turn orange after its finished powering down. In my opinion I prefer an external power supply. It helps you know what the console is doing. Plus its much easier to replace if it goes bad.

[@ramoncamacho2367]

What could it be if the xbox doesnt turn on at all? It's not the power brick cuz i have 3 and work fine on my other xbox one. I gave it a look with a multimeter and found that i have the fuse where the power comes in has no current could this be the problem. By the way love your videos they are great!!

[@y.thuvarahan4171]

Hi bro can you help? I want to know about the ic What is the name? And where can i get that?

[@johny1220]

Bro please help!!!!!!!!!! I have 2 original Xbox one motherboards with me, I tested the C9F12 little chip thing (still new to this) and on one of the motherboards it shows OL and on the other 0.70! Both are defective but could the open loop one be the issue for one of them?!?!

[@GoodHydration]

Have you come across any xbox one x systems with a faulty u31 or u32 (location number on the pcb) chip?

[@jmsfamilyonly]

Hello there. I just wanted to mention I clicked on the link and the diagram is no longer available on tinypic.

[@kotm3]

Andrew, what brand of flux and IPA do u use thanks ;)

[@sofasniperman]

Amirite ipas are good 😁

[@jacobbssid2310]

Where do you buy replacement MOSFETs? Specifically the type you replaced in the video?

[@AndrewPaul]

Mouser.com

[@howzechris1]

what kind of capacitors and resistors are them on the Xbox One because I have an Xbox One does the same thing and want to fix it myself can you give me the information so I can buy them be greatly appreciated

[@Gta2O13]

Mine powers on fan dose not spin then shuts off. I did take it apart to check if anything was blocking the fan but nothing was. Got another fan same issue. Tried all the reset methods and still nothing. Nothing looks burnt like in your video. Also tried another power brick and same problem. Power brick is Orange when plugged into it. Then when I plug it in it does turn white. So power bricks are good. So I have know idea what's wrong. Any help?

[@sergelavallee7331]

Hi! Andrew. You're the best tech i ever saw. I'm a tech and i'm not able to de as good as you. I wish to have your skill. Where did you get all that knowledge? What kind of electronic supplement course should i take to do like you do? Thank's anyway for the wonderful videos you show us.

[@AndrewPaul]

Hi Serge, Many thanks mate :) To be honest the best thing you can do is buy the equipment, read and watch from other tech's and finally practice, practice, practice! I bought my first soldering iron at 14 with some other basic soldering tools using an old Panasonic VCR remote control PCB and an old computer motherboard for practicing. 16 Years ago that now! Scary stuff.

[@sergelavallee7331]

I was sure you would say this. I will keep watching your videos very carefully., and practice, practice, practice. I love working in consoles too much. Thank you for taking the time to respond me. take care.

[@sergelavallee7331]

Thank's for your quick answer. I'll keep following and study your technics carefully.

[@sergelavallee7331]

Hi! Andrew. Question. What model of HDMI connector should i buy to change one broken on a ps4 and do you sale some and what price. I want to change it for a good one? Thank you. Serge.

[@AndrewPaul]

The v2 ports are the better design. Get those if you can.

[@larcito3507]

I have one for the "strange" department: XBOX One, shuts down after 5 seconds if the internal HDD is connected. When it's not, it stays on. Tried with other HDDs, nothing. Different cable for the HDD, nothing. Any ideas? Thanks in advance!

[@Sudds1888]

Brilliant job, fair played lad! 👍🏻 One question though... why do you use such a big chisel tip for such intricate work?

[@AndrewPaul]

The fet has a large ground pad underneath. It draws heat out of the smaller tips too quickly for them to effectively rework the solder already on the pads hence the larger tip.

[@ali2bah]

Awesome, Thank you. Now I have black screen in my xbox one I will open it and see whats wrong with it.

[@AndrewPaul]

If it maintains power but the screen is black, try and boot it to the Troubleshooter menu. If it fails, it's likely your hard disk has died.