How to replace tristar (U2) charging ic chip to solve slow charging, fake charging problem

[@JessaJones]

Buy a Tristar IC with same day shipping from New York! store.rossmanngroup.com/index.php/ics-components-and-chipsets/components-by-type/charging-circuit-components/tristar.html

[@HISTORIAS_DE_TERROR-Y-MISTERIO]

what kind of liquid you use?

[@matthewtalbot2140]

Great work there, I'm a little jealous of your work bench setup. I need to get myself a nice air station. Thanks for taking the time to make these video's. They are excellent. :)

[@mobbn973]

Some of these issues are dead battery symptoms as well. Slow charge, quick drain, phone reboots while battery is connected, and also no change in percentage while charging. Great video none the less!

[@ibjessa]

Yes, like it says in the video--repairs shops first rule out the easily solved bad battery and bad charge port before considering U2 failure.

[@mobbn973]

+Jessa Jones yes maybe you misinterpret my purposes of highlighting battery issues as the video's target is based on the u2 charging ic chip. I own and operate a repair shop. And from this level of experience 1 out of 50 iphone 5s's that come in with charge issues are the u2 ic chip at best. Most repair shops always overlook the common issues. I have been in this very new industry for 5 years and have worked with countless repair shops in countless areas. My statement was actually positive feedback and actually adding some specific information to an already great video. One of the reasons i chose Information Technology is because it is always advancing and we are always learning. Each one teach one attitude. But thanx for ur re re iteration of what kindly pointed out in the first place.

[@davidgibson8523]

very good. did you replace with a new chip? or just resolder?

[@Jonicraw]

Awesome Video Jessa! I love how you take the time to take apart the phone while explaining every step in detail and why certain things are done. This is perhaps the most crucial to learning. Understanding each step and having a reason for each move such as proper heat, adjust heat and air flow, then removing with flux and using braid and so on. Beautiful setup and video! Keep it up!

[@TonyToneFixMyPhone]

Will knocking off caps/etc near battery terminal mess up U2? For example: A cap gets unknowing knocked off and battery is connected, or plugged in and thus U2 could be damaged? Because after replacing caps with new ones from DigiKey and continue to show symptoms is a recurring question I've always had. Thank you

[@promackid]

Hey jessa great video. This looks fairly similar to replacing the LP8550 on a macbook pro just with a sightly bigger chip and a much smaller board. Is this the case?? Also is that the Dell P2715Q 4K monitor in the background??

[@cemturkoglu5491]

hello rehap. ı really like your videos, you are a real professional. ı want to ask you something, while you are changing the iphone 5s u2 integrated, how much degree you heat up. and which level the air blower at? i would be really appriciate if you reply

[@capth00k]

Great videos Jessa. I'm curious -- I have an iPhone 5 ; it will not detect iTunes , or charge... I replaced the battery and it started up. Still wouldn't charge. So, removed the battery and attempted to power up with just the charger -- no dice. Could this be the u2 IC ? ... Why don't most techs offer iPhone 5 u2 IC services?

[@JessaJones]

yes. and because it is a giant pain in the ass on the iPhone 5. Not worth the trouble.

[@capth00k]

Thank you so much for your reply. I found a service (on ebay) for $30, plus shipping and they will replace the u2 IC on my iPhone 5 (only seller that would do so) ...just out of curiosity why is it more of a PITA to do one on a 5, in comparison to say a 5c, or 5s ?

[@JessaJones]

U2 is next to the CPU on the iPhone 5, so there is a good chance of killing the CPU. So then you have to explain to the customer that while they started with no charging, they have a dead CPU. Too much risk for $30!

[@capth00k]

Ohhhh, I see that makes perfect sense. It is pretty close to the processor, so heat damage becomes a concern when you remove and reinstall that u2 IC. Well, I fixed mine yesterday fairly quickly -- to all those thinking it may be their u2 IC ; you should try replacing your charging port first because the part is cheap and it's fairly easy to do. That's what ended up fixing the problem for me ; and I was still getting voltage at some of the test points. No charging / no USB sync. Now all is well in iPhone land.

[@alexandrab3460]

Hello i'm a big big fan and i need plllllleeasee an advice. I search a soldering iron and a hot air station. Please tell me what are you use???🙏🙏🙏🙏

[@larsmehlhop-lange8884]

Hi Jessa, great Video! Unfortunately, I have neither the equipment nor the skill for serious board-level repairs, but I have a more general question: If I use a genuine Apple charger, but with a cheap replacement USB cord (instead of the original one, which broke a while ago), can that also cause damage to the U2 ic? [FYI: My phone is currently dead (black screen, no boot, no response to hard reset) and, upon connecting it to my laptop, it gets stuck in a loop: connect-to-itunes >> attempt update/recovery >> error 4005/4014/4015 (varies).]

[@tubevideos187]

Hi, great video .... A question ? Do you know what it is the 47 error on iTunes, it is possible solve it and how? ....

[@christothegreat1]

IPhone 6 help needed. Slow charge. Fast drain. Uncertified charger and usb lightning cables have been used. Is the Tristar likely damaged and causing this slow charge fast drain?!

[@TonyToneFixMyPhone]

Put a 1610A2 in a 5S for rapid battery drain, and looks to have solved the problem. Thank you.

[@hectorayala8626]

hello my dear jessa, i use the same stations, can you please tell me what temperature and air flow you use? thank you for your time doing this videos

[@JessaJones]

whatever works for whatever i am doing

[@velawireless1910]

Hey there!!! it's a good job. I would buy a microscope like yours. I was looking for Ebal but does not include the camera to connect to a monitor

[@mario29021980]

Hi Jessa, Loving your work!! Massive well done on helping out the masses :) Quick question, I had an issue with a 5c With fake charging, have have replaced the charge port, Battery and the U2 chip (thanks to the vid) but it's still fake charging. Could there be another issue at fault like a capacitor or something? Thanks again Mario (Blackpool England)

[@ibjessa]

Check for missing components by dock connector

[@mario29021980]

Thanks Jessa, I will double check everything again tomorrow, and maybe even change the U2 chip again :) Fingers Crossed. :D x

[@FelipeCohen]

Omg Jessa, you are the best on this job! I'm in brazil and will need your help ;)

[@stephenelliott8516]

Just watched this and repaired my first u2 tristar. Excellent video! Quick question, you said if you did the repair now you wouldn't bother with braid, do you just sit the new one on top and let the hot air melt old solder back in place? Seriously thanks again, this vid helped a lot!

[@JessaJones]

+Stephen Elliott bead individual pads until they all have even amount of solder. Wicking means risk of ruining the pads. These pads are stuck on with scotch tape

[@mustangrandal9792]

Good Morning Jessa, I have replaced my U2 IC on my iphone 5s and now my phone will display a battery and a charge cable on the screen. But when I plug in a cable it won't recognize the cable and will not charge. Can you give me some hints please? did I cook something? PS I love your videos! Perhaps I heated something up and caused a component to move. Where should I look?

[@ibjessa]

Rule out bad parts. Then rule out bad Tristar placement/wrong chip.

[@ronaldmiller2031]

Initial 5S board slow charge fast drain from cheap China Charger cable eliminated battery and flex cable as issues- Replaced U2 chip, repair went well -or seemed to.... good heat, shielding etc Board fails to power up now-even with charged battery installed Just wanted to see if you had seen this happen before and possible pointer where to start looking Also just repaired an old 4S w dim screen-know what it was...THE COILl!....haha :) Thanks for what you do, hooked on your videos

[@andgodiknowimone6753]

Hi, I have a question. My iphone (7) is randomly shutting down, only powers on when connected to charger. Sometimes it is working normally during one or two days. What do you think if the tristar ic chip could be a reason? Thank you in advance

[@pierredelecto7069]

You are awesome. You've Inspired me to open a mall kiosk and do screen repairs. Maybe in a few years I'll change chips like you. Thanks for sharing your know how.

[@gentilferreira7508]

Hi Jessa, in regards to your mosfet in that case he could not be the responsible one? If not with respect to him not to switch what would happen? thanks for your attention!

[@JessaJones]

You mean the Q2? Yes he must be working

[@gentilferreira7508]

ISSO O Q2, COMO ELE É BGA COMO FAZER SEU TESTE?

[@ihackmobile]

Hello thank you for a great video. I have an adjustable DC power supply. What voltage and current should I be setting it at to power up an iphone?

[@JessaJones]

+ihackmobile the current will be dependent on the phone---you will set the voltage to equal the standard battery voltage

[@flipdamadapakincoin]

hi Jessa, i removed the u2 chip from my iphone 6 but i think i damaged these pads where the chip was sitting on while taking off the chip with my tweezer.. how do i reball them back to normal (which is not easy without a microscope). should i do it like just the way you did in this vid? or do u have any other tips or suggestions to reball these pads on my board? thanks in advance and best wishes to you.

[@afaqhaider6248]

hi Jessa, this is the exact information i was looking for, i have made a comment on one of the videos of louis mentioning my problem, now that i know what is the culprit, i can recheck my phone's "illogical" board when i receive back from the repair shop. only one question i have, i mostly charge my phone with a car charger, whose output is rated at 2amps, its an expensive one i bought it for maybe 200 AED. at home i use the original charger, should i change my car charger too ? as you said this problem occurs mostly by using knockoff chargers/ non original chargers. please reply at your convenience,

[@glynrichards9074]

Hi, I have currently just started a new mobile phone repair business and most of my work is more plug and play rather than board level. I have done some surface mount work in the past and used an airflow rework station to remove QFN's, SOTP's but never have I done BGA's. the techniques looks similar to those I have used in the past but because I am looking to repair customers phones it feels risky (of course I woukd practice first) however my question is, woukd an infrared set up be safer and easier to use for U2 and WIFI chips? or is a hot air station still considered the best way? any help would be greatly appreciated.

[@JessaJones]

infrared stations are great ways to burn up iphone boards

[@glynrichards9074]

Thank you for your reply :)

[@ChristianGutierrez]

It's amazing to see you do what I thought was impossible!

[@LuisCruz-yg6rs]

Hi, There are so many hot air work station (Japanese, American, European and Chinese) out there that it can be a pain to choose the right one for you sometimes. So my question is what defines a good hot air station? Will it be possible to get this job done properly with a cheaper Chinese Hot Air Station? Thank you in advance!

[@adamidan3792]

very nice fix you really make evrything look so simple (: how did you get the ic without cleaning the black apoxy and what nuzzel did you use i nver see this kind of thecnic for uw replacement very good work .

[@JessaJones]

The 5s is a good example because it does not have underfill under the U2 chip.

[@adamidan3792]

+iPad Rehab iam a cell engenir and i start working on boards also nice tips realy love your work

[@adamidan3792]

iPad Rehab what nouzzl size did you use I see that you put the heat under the ic really good methood u never see this kind of work it take out so fast ! Realy nice

[@osnubimad732]

i realy love to watch you every day...nice job

[@artccie]

Awesome Video!!! Do you have a ventilation hood system in your electronic lab? waiting for the quotation response now thanks! Art

[@saschashah5701]

Hey there... You mention a "common no-boot problem" being the power management chip. My iPhone 5 wont turn on, I tried replacing with a known good battery, same thing. Would you recommend trying to replace the 338S1131 or is there any way to confirm the problem? Help greatly appreciated!

[@JessaJones]

PMIC failure is much more rare than any other no boot cause. Look for shorts or missing data lines first

[@saschashah5701]

Thanks for your reply! I just opened it, looked around, didn't find any shorts but without doing anything it fully booted once. So i thought its good. Put it back together, it boots till the Apple logo, then shuts off. Could that be U2 as well? Same with a known good battery...

[@TonyToneFixMyPhone]

Oh, missing data lines. Gotta figure that one out next. I have an analog scope, better digital?

[@sudheerm.s6792]

What temperature are you using to remove shield and what temperature you using to change the ic ? and also air

[@donmoran9969]

HI Jessa, Really enjoying your vids. I'm trying to repair my daughters 5s, it's stuck on Apple logo screen. Tried everything to restore but nothing works so took it apart first thing I'm checking is the battery voltage which come out at 4.26 v would over voltage cause a no boot problem? Cheers

[@JessaJones]

+don moran no

[@stefanniedzielah1827]

you are checking that battery under load, right?

[@lornafletcher6174]

Hi Jessa, I hope you can help me. I have a IPhone 5s and I have been having problems with the battery for a few months. Problems first started when it would only charge to 57% and then stop even thou the charging lighting symbol was still showing. Then it would drain very quickly even thou its plugged in. Now it wont charge at all, all I get is a black screen with the battery icon showing red and it wont charge. Any ideas?? Great videos by the way, keep up the good work. If I got the U2 chip changed, how long do they usually last?

[@JessaJones]

Probably U2 chip related but as always thinking measuring and figuring it out is required.

[@lornafletcher6174]

thanks Jessa, if the U2 is at fault and is replaced, how long does a new one last?

[@ibjessa]

+Lorna Fletcher until you blow it up with a non-Apple charger

[@TonyToneFixMyPhone]

I notice swelling batteries cause the U2 to fail also (sometimes)? Or the non-Apple chargers and U2 causeing the battery to swell? I notice they swell two different ways. Usually like a balloon and U2 will be good. But if hard like a rock and bumpy usually bad U2. Or am trippin'

[@lornafletcher6174]

ive only used apple chargers

[@luix9]

which hot air station you recommend Jessa thanks in advance. ?

[@JessaJones]

Somewhere between 300-450c depending on the job. This always differs. iPad Rehab highly recommends the Quick 861DW bit.ly/2xGDTXo for a cheap, affordable, powerful hot air station with an easy interface. It will remove all different types of chips without a problem, unlike weaker stations that can't stay hot enough long enough to do the job.

[@skyller0079]

Hi Jessa, what kind of material is that "chip" ? Would it melt if I used a soldering iron to remove this chip as I do not have hot air station??

[@JessaJones]

+Skyller007 that is possible but tough. you don't want to pull pads under the chip.

[@njyasin]

I have an iPad 4 a1458, Wall socket mains charger exploded while it was connected to my iPad, I have replaced charging cable and wall socket but still no joy, my iPad won't turn on, no power. Is changing (pmic) Power IC on motherboard will fix the problem? and is that something you can do for us. If so please let me know how to book in for repairs and how much to get it done. Kind regards, Nas.

[@SURGE101]

I got the same symptoms as described in the video on my iPad mini 4 , it starts up with a brand new battery but won't charge, it says it's charging but the battery percentage won't move (fake charging). Has the iPad mini 4 got a u2 chip??? If not what could be causing this fault??? It loads up and restores fine on iTunes but won't charge...please any help.jay

[@The3DLink]

Hi Jessa! First I'd like to thank you for your informative video. I do have a question about my iPhone 5 that I'm having a problem with. I recently plugged it in to charge on some USB wall outlets that I have just installed. After a few hours, it only shoed 3%, when it started at 7-10%. I moved it to the official Apple charger and went to bed and noticed it kept turning itself on and off/rebooting. I figured it just check it out in the morning. Unfortunately, it was stuck in this reboot mode for a long time. it finally ended up displaying the "connect to iTunes" message. It's now stuck on that whenever it's plugged in. However, it's not getting recognized by my PC. I'm not able to access my data or turn it back on. Windows is saying the USB device has a hardware issue. Could the U2 chip be causing it not to be recognized/connect to anything? I really need the data off of there as I have tons of pictures/video of my family. Any help is much appreciated.

[@JessaJones]

Yes, sounds like U2. Put in a new battery and offload data by wifi

[@The3DLink]

I've tried a new battery. Unfortunately, it turns on but still won't get past the "connect to iTunes" screen. Nothing recognizes the phone when plugged in. I've already ordered a new U2 chip. That thing is impossibly small! I can't tell is if it's already "balled" or not. Mostly, I just want to get the pictures/vids. I really don't care if it's 100% operational or not, so I may just attempt to reflow the new one on. Bad idea?

[@marcingogowski6077]

Thank you. You confirmed exactly all symptoms I had. Great channel!

[@marvsssvlogs]

can you make a video iPad mini 2 , U2 IC ? ive got one, is it easy to replace U2 on ipad mini 2?

[@riyazuddin4384]

Hey Jessa, how are you, witch one are you using the flax can you say flax name

[@HanioZuniga]

can you answer my question? the hot air gun you're using is butane gas? can a mini heat gun be used to remove the shield to get to the u2 ic chip?

[@JessaJones]

+Hanio Zuniga I would only recommend a professional quality hot air station from a good brand like Weller, Pace, Hakko, Metcal, or JBC

[@THoMZoNENeT]

Hello can you help me please, i have an 5C and 6, the problem was not charging, i did replace a new U2 / U1700 ic, now the phone shows its charge but not increase percentage. Im not a starter, i made this skill many times, but now i dont know what to do...On logic board not damaged, already check. Battery and dock connector changed, same problem. Many thanks!

[@deshakhairat8922]

hi,ihave got a galaxy s6 edge which has fast charging issue i have tryed all common solutions but it doesnt work like changing cables,or the whole charger even mobile socket,do u think it's ic power also??

[@jorgepina8858]

Hello Jessa! Can you help me, i have one iphone 5s and i already change twice the chip u2 ic, change battery, but still discharge the battery very quick(12% standby in one hour), no missing components near conector batery, do you have any ideia? Thanks

[@JessaJones]

Some short somewhere

[@haythamabedrabo7160]

I have an Air 2 that will not power on. If plugged into charger, starts to boot loop. When I try to restore it, I get error 4005. Battery is good. No water damage. I've ruled out all parts attached to the board except for the charge port. Could it be the charge port, U2, or PMIC?

[@VoltageLP]

I have an Iphone 5S, it had problems with charging for a few days (the charge was displayed at 1%, but it was definitely charging , the charger was getting warm), worked like that for a few days but then turned off, now it is asking for charge and recognizes when it is connected to a charger but it does not charge, it stayed like that for a quite few days and still displays empty battery, so I think the battery had some charge in it when it turned off. Is it a U2 problem or a U7 problem and how can I tell? I have access to a soldering station with a fan, so I want to try to fix it myself since repair services are asking 50 to 70 bucks for that. Thank you.

[@JessaJones]

I'd rule out bad battery first, then tristar

[@VoltageLP]

Thanks for fast reply, I've changed the battery a few months ago since the old one was holding charge for only 6 to 8 hours. Will try to put it back in and order Tristar if it doesn't help, thanks.

[@VoltageLP]

So I've measured the current draw and it looks like it is charging (the phone took around 350 mah @ 0.67 amps before current draw gradually dropped to 0) but it won't turn on, just shows an empty battery on screen when power button is pushed, so I'm still not sure whether it is U2 or U7 to blame

[@TonyToneFixMyPhone]

Question Jessa, I have a Belkin USB cable that will charge damaged U2 IC's. I've used other Belkin cords, Apple cords etc. Nothing will charge a bad U2. But why is it that this one and only this one will charge bad U2's ??? It is puzzling ! Please share some insight : )

[@TonyToneFixMyPhone]

Word! But it's only 1 cable out of 10 I had that would do that. I bought some more & just waiting for another bad U2 to test. It'd be cheaper to sell them a cable than change the chip.

[@cesarmatos4024]

Greetings jessa, i have a costumer iphone 5, Battery its getting to Hot, maybe something with the u2 Charging Ic?

[@HanioZuniga]

is that hot hair gun u have on butane gas? can you use a mini heat gun to remove the shield so you can get to the u2 ic chip?

[@liboy34]

hi ipad rehab How did you learn to repair the phone

[@JessaJones]

by reading the internet and using my brain

[@dhavalpatel5058]

iPad Rehab which was the internet resources you read? I am sure that I can use my brain well. :)

[@luigimartinez7127]

Hey. I have a iPhone 3G or 3GS and I have some info I need to take off Of it, and I can't seem to turn it on. Do you know of any tricks or tips that might help me in my situation. It's been a good few years since I powered the phone on, It did work last week, and when I tried to charge it. It didn't even want to show the charging symbol

[@JessaJones]

+luigi martinez power the board with a dc power supply for data retrieval

[@jessyjay6095]

Hi, I just wonder how much do you charge for this kind of repair as I live in London UK and guys in my local repair shop are trying to charge me £70 which is roughly $100? I think it's too much :D ..is there any other way to replace it? for example to use the iron? many thanks

[@ibjessa]

I charge based on the value of the device. For 5s I would charge $99 USD

[@jessyjay6095]

Jessa Jones Why so expensive? These U2 IC Chips cost a couple of cents ?!

[@ibjessa]

+Jessy Jay yes, so just follow the video and do it yourself, it shows you exactly how to do this repair. If you would prefer to take advantage of the thousands of dollars of specialized equipment and thousands of hours of experience and outsource it to us, then that costs $99 USD, which is less than replacing the device.

[@jessyjay6095]

Jessa Jones lol :D Thanks for the video I will do it myself.. btw the hot air station costs less than $40 hahah so yeah expensive equipment :p good one

[@ibjessa]

+Jessy Jay just to be clear --you will no longer have a phone at all if you attempt to replace the U2 chip with a $40 hot air station and no experience. With that said, best of luck. Hope you prove me wrong.

[@kirkakirjakov9063]

Jessa what temp you use for desoldring U2 chip, and what for soldering???

[@JessaJones]

Hot enough, not too hot. Learn your station

[@keithseeberan]

hi jess ,good work i have a problem with iphone 5c, took off screen to replace now no power at all? charged battery too! and ideas appreciated☺

[@JessaJones]

differentiate no boot from no display by connecting to iTunes

[@MarcosAlcala]

iPad Rehab same happend to me no boot pc wont recognize it if i leave it in the charger it will get hot

[@leefowler888]

Hi Ipad Rehab what model is you scope please? kind regards

[@rensopineda3819]

Hello, This solves the problem of indicating charging but does not increase as it does slow increases?

[@lukasorange7856]

Hi, thanks for interesting video. I've got an iPhone 5s with no boot problem (no usb detection as well). Once connected to good battery and pressing power button the phone generates some voltages (1v, 3v, ~200mA) however the display does not come on. The display and charging port have been tested with other phone. Is it the power management chip which is partially damaged, any ideas? Thanks

[@JessaJones]

+Lukas Orange 200mA sounds pretty normal. Is it detected by iTunes?

[@lukasorange7856]

+iPad Rehab Thanks for replay. it is not detected by iTunes (the Lightning connector and display has been successfully tested with other phone). The voltage on the lcd backlight is not rising and stays at battery level. The phone is not charging the battery as well so I have to charge it in other phone or supply iPhone from power supply.

[@JessaJones]

This could be many things, with 200mA it sounds like you have a separate display problem and usb detection problem. I assume you are prompting it to boot by shorting the power connector or using a power flex. I wouldn't think a phone could consume 200mA and be a dead phone.

[@lukasorange7856]

+iPad Rehab I am starting it up by pressing power button. If the display does not come on and the usb is not detected it might lead to broken power management chip. I will try to measure some more voltages. I assume that if the USB interface chip is faulty it will not prevent device to boot?

[@JessaJones]

unless the U2 chip itself is shorted, in which case you would likely see more than 200mA consumed. 200mA is normal function of PMIC and CPU.

[@jc-xw4oj]

please what kind of flux do you use and what temperature and level of heat do you use ?

[@JessaJones]

We use NC-559-V2-TF flux which can be purchased here: mailin.repair/amtech-nc-559-v2-30-cc-16160.html It is the best stuff there is. You can also get it with a plunger & needle tip for a small fee.

[@IntensaBlue2JZ]

Jessa: Do you know a good place to get NPX 1610A1 chips? or did you have a donor board?

[@JessaJones]

China

[@orlandolopez1111]

i have a iphone 6 plus but it doesnt do any thing complete dead and the previous owner said she left it plugged in over night charging with a cheap after market charger and in the morning it wouldn't turn on or do anything i have also tried plugging it in my computer to see if it reads it but nothing at all what do you think might be the problem? i also tried a good known battery and it still didnt do any thing need help please and thanks

[@cardinaldom574]

Hello, please I need help. my honor 4x screen touch is not working. I replaced the screen still not working. Please what do I do to make it work? Thanks.

[@supinac17]

Hi, I watched several videos regarding Tristar problems. My symptoms are different. I have only apple logo on Iphone 6s after power on. When I connect power cable and measure voltage on battery rails it show me 3,65 V which looks like no problems with Tristar. What do you think about it ? Do you have any suggestions ?

[@JessaJones]

Send us a repair request at iPadrehab.com

[@Jimsss4308]

Does the phone heats all the time with that issue?

[@artccie]

HI my post was deleted for some reason....weird..I did not know what I said was controversial..I asked.: 1. Have an ipad 4 with the cannot get past unknown 4013 recovery error 2. great condition no damage to the body at all 3. Does not charge when using different chargers and usb chords... My question is where can I send this ipad 4 to get the U2 IC chip replaced? thanks! Arthur F.

[@ShrikantPatelhypebeast]

i have iphone 5 the problem with it is that it charges slowly, and btry drains vary quickly. also if mobile get switched off for long time and is let like that for long time then even after connecting to charger it doesn't charge. so is it the charging IC problem?

[@umerasif6822]

All iphone model u2 ic are same ?

[@eyelette]

Sorry, I may be missing some info..Is this the 5s? The i5 has underfill/epoxy - how would you remove that?

[@JessaJones]

+eyelette I will be posting a video today of iPad mini PMIC replacement which has underfill, same strategy

[@harrytu7893]

should i change my charging port connector or what ?

[@AlexPerez-km5pj]

Hi, i need some help! i changed the screen on my iphone and now it doesnt turn on, no charging, just no response. i did check all the ribbons and nothing still... i think its a short? Can it be this problem? i also did take out my mother board and moved it to another iphone 6 i had and no response. i may also think it could be when i was switching out the ribbons for lcd while it was still on. Please really need help thank you!!

[@nothin1456]

When its plugged in for a while , does it show up on itunes or can you make vibrator motor sensor virbate by muting and muting ? it might be a display (ic) issue. cheers

[@Samey44]

Got a 5C at work that seems to show a weird like colour on any screen we plug into it, after a few mins though the display fades to darkness, also we dont have any touch at all, but the phone charges and boots fine, what could it be?

[@JessaJones]

Water damage, bad touch/display power chip or local caps

[@10MBorLess]

she is right about the hot air station. i have an rework station that i got from amazon for about 60 dollars and it takes for ever to desolder an ic.

[@JessaJones]

iPad Rehab highly recommends the Quick 861DW bit.ly/2xGDTXo for a cheap, affordable, powerful hot air station with an easy interface. It will remove all different types of chips without a problem, unlike weaker stations that can't stay hot enough long enough to do the job.

[@dartmouthcat]

unrelated question ...sort of....Where did you get the Alcohol dispenser? I'd like to get one,

[@andrzejsydorko7036]

So here's a question, is A1 and B1 on tristar critical for charging? What if these 2 pads are pulled (ipad air 2)?

[@nz_jonny6117]

Hi Jessa. Only when you get a spare minute :) I'm working on an iPhone 5 that is charging the battery but won't register it's level so it won't turn on, and it displays bat empty icon. However, the gas gauge line is in tact. It will sometimes try to turn on and show apple logo but after a few seconds it will fade out and repeat forever. No liquid damage. I'm doubting it is U2 at fault as USB comms seemed to work when it showed DFU screen and the symptoms shown here don't seem to be present. I'm going to start checking voltage rails in case one is loading up/shorted. Hoping you have seen this behavior and can advise if it's also a common fault or not. Greatly appreciated, love your work!

[@nz_jonny6117]

+iPad Rehab UPDATE: so far no luck. Really trying to avoid pulling the U2 so I got to the point of seeing the watchdog timer from U1 into U6 go high causing a reset and this happens during boot or just before iOS is reloaded (apple logo and progress bar showing). Hoping this might be a software issue and I could force it to continue I removed U6 and grounded the output pad so U1 would never reset. Sadly this hasn't changed and it's still resetting, looking more like something telling PMU to shut down and come back as all the rails drop before the reboot. Now think watchdog went high as a result of U1 losing power. Will let you know if I have a win.

[@ibjessa]

+Jonathan Dix if it is U2 it will boot with known good battery

[@ibjessa]

+Jonathan Dix or DC power supply

[@nz_jonny6117]

+Jessa Jones Thanks so much for further helping eliminate U2. I believe battery is good so must be another issue. Will try with DC supply just in case, but I thought it would have issue not being able to read gas gauge line. Will post update.

[@JessaJones]

+Jonathan Dix it will after a few minutes, but it should boot and come to full display before it notices gas gauge problems

[@rickii2010]

my iphone 6 reboots after 3 mins constantly whether is plugged in or not. It does charge,connect to itunes, restores and updates, when reboots it says 1 percent then when you hit the home button its says the right battery percentage does this sound like a symptom of a bad u2 ic?

[@sejukush]

hello ipad rehab, i got itunes error 48. what is possibly the IC need to replace to make it solve

[@mystique9047]

can u please answer this question.. my iPhone 5s is charging normally, i have replaced the battery, im sure its not software issue cause i tried everything and i get my battery drained within 13 hours of standby. so i suppose this issue is u2 related

[@ibjessa]

Could be any short. Could be U2

[@mystique9047]

+Jessa Jones Thanks

[@dwisetiawan3812]

hi jessa i got iphone 5s and i service like wasted about 140$ changing my charge ic on iphone 5s and my phone charge well until 1week my phone still charge very slow idk how to do now i used all my friend charge and it still cant charge like 1hours/percent

[@MrSucriE]

where can i buy the chip? or where can i get u1700 repair service?

[@eyelette]

were those symptoms listed at the beginning ALL happening whenthe U2 fails, or any 1 or more symptoms can happen?

[@ibjessa]

Any one, or all.

[@ninar.173]

Hi I live in germany my phone has a problem it restarts after charging but the problem is combined with graphic problems apple does not touch it used phone and the repair shop was useless did not solve the problem. The sreen seems to get wrong signals cause even the lines of the apple logi whgile booting is somehow stretcht to some lines then the whone works pritty well for some time but after using the camera or after loading problems come back. pleas give me a hinge what to do?

[@maniclokofe4585]

so I have to take back the iPhone ?

[@muhammedalauddin1324]

I am from Paraguay need your help to remove charging chip if you can please help me for this

[@hatemboussba4180]

I have a smartphone IPHONE 5C display the charging on screen but it doesn't charging what the component who responsible about this problem i have to change it .and i put a new battery and nothing happened. THANK YOU.

[@antonikavalinovski2517]

If you change the u2 chip on iphone 5s how can you be sure that it wont fail again in ablut 2-3 months or it will go on about 2 years ?

[@JessaJones]

As long as you don't use cheap chargers it will not fail.

[@munecodpapel]

Hi! i had a problem with my iphone 5, if i connect it to the pc it syncs with itunes and i can do restore upgrade anything but it does not charge, i need to turn it off so the iphone can charge, you know what would be the problem?

[@munecodpapel]

+Eiza Huppenkothen Poniatowska replaced brand new charging port and it does do the same

[@ramimislamrobin6551]

+Eiza Huppenkothen Poniatowska iiii

[@munecodpapel]

did you find a fix for my problem

[@aikajnabi1]

what type of microscope you are using?

[@JessaJones]

Hi! Thank you for your interest in the equipment we use. I use several different microscopes here, including an Amscope microscope, that can be purchased at the link below. www.amazon.com/gp/product/B005MRAAR4/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B005MRAAR4&linkCode=as2&tag=rossmanngroup-20&linkId=8c3b94523f849afcbb9e232f303e4670

[@custompctipsandtricks7257]

Hello,ive got great problem! I've got two times mini 4! One charges only when off ,another have problems with the touchscreen-sometimes doesn't work! Suspicious u2 and u 15 but not sure! Can someone advise me! Thank you!

[@DavidTOBerry]

You truly create brilliantly informative videos. I am glad I stumbled on your stuff.

[@itechbh1869]

Esse reparo resolve quando o computador ou iTunes não reconhece ele?

[@Mehdi-os1it]

hi .. can u tell what flux do u use ? thanks

[@JessaJones]

I use this: mailin.repair/amtech-nc-559-v2-30-cc-16160.html

[@PoloOrbit]

May I suggest getting a better microphone with a pop filter this would vastly improve the audio quality. iPad Rehab

[@ultrapatch3843]

Hi. how to solve "fake charging" on a iPhone 4 ? Thanks in advance. :)

[@game_master_rukia]

Can a bad one cause a reboot loop

[@kathleenroxannehansrote7526]

can you replace power management chip for a 5c...thank u so much for info

[@JessaJones]

yes--but it is rare to have to do so

[@mathewculver3948]

iPad Rehab we have seen absolutely loads of U2 replacements needed on iPhone 5C here in the UK

[@qshomeoffice]

i have a question, i have the same problem but my home button doesnt work...could it be somenthing else than u2 chip?

[@JessaJones]

+Goran Kušević most definitely.

[@qshomeoffice]

+iPad Rehab i got a new dock, now it's charging, bit the home button still doesnt work, can you please give me some advice? My email [e-mail]

[@JessaJones]

+Goran Kušević what phone is it?

[@qshomeoffice]

iphone 5s

[@diesalweasel]

+Goran Kušević hi I had this issue on my iPhone 5 I replaced the home button. that didn't solve it . I replaced the usb dock connector which is connected to the mic and loud speaker. This solved my issue