How To Troubleshoot A Dead iPhone - CPU Repair

The CPU of mobile phones functions just like the brain of our body. Which makes CPU repair the most complicated subject in mobile phone repair. Check our video today, iPhone 7 won’t turn on caused by pseudo soldering of CPU and learn how to troubleshoot repair cases related to CPU.
Tools Used:
Hot Air Gun Rework Station - 990AD bit.ly/2Jpu3kH
Soldering Iron Rework Station - 969A bit.ly/2HOjW6m
Digital Multimeter - F17B+ -Type 3 bit.ly/2TQwIsi
Communication Maintenance Power Supply: bit.ly/2IizeyY
Electron Microscope - Type 1: bit.ly/2MReRda
Solder Wick: bit.ly/2JxkleU
Rosin Soldering Flux:bit.ly/2sJOKMB
Straight Tweezer: bit.ly/2JhKyP6
Curved Hook Tweezer:bit.ly/2sM1hPL
Screwdriver: bit.ly/2Bv7EMg
Anti-static Wrist Strap: bit.ly/2LyJAyn
Sculpture Knife: bit.ly/2LI1yLl
Soft Brush: bit.ly/2DsKlEz
Anti-static Plastic Pry Bar: bit.ly/2Lkky6W
Stainless Steel BGA Scraper: bit.ly/2IpBDrg
Free schematic tool:
REFOX: bit.ly/2w9jWai
Browse our online shopping site for more parts and tools: shop.rewa.tech/
Any questions and demands please feel free to contact us at: [e-mail]
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[@rewatechnology2008]

REWA iPhone Chip Level Logic Board Repair Training Course Schedule - Global Program For 2019 For the details: bit.ly/2PAQ5yJ Enroll Now: bit.ly/2CbDDSN Any further questions please contact us at: [e-mail].

[@deepakrai4832]

Awesome I want to learn this types of skill

[@munaabdalmalek5586]

REWA Technology I'm so looking forward to 01.04. on my training with rewa in czek

[@rewatechnology2008]

@@munaabdalmalek5586 Looking forward to seeing you then. And hope you will enjoy.

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you all probably dont care at all but does anyone know of a way to log back into an Instagram account..? I was dumb lost the password. I would love any tips you can offer me

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@Mordechai Kace Instablaster =)

[@ahmedsahari9200]

What I like the most in this channel is the expertese of your employee, they know exactly what they are doing, they diagnosize each problem to come at last to the perfect solution, keep up the good work

[@rewatechnology2008]

Thanks. what you said really encourages us. We will keep up our efforts.

[@One-ummahh]

Sir tell me please cleaner name

[@FAST_VR1]

Right tools is half the job….then skilllsss....

[@aaniketmalik8464]

Your video is more inspiring for us, with the help of which we have been able to increase our skills. From india

[@Cherry-fz2sm]

Oh..God...! you guys are really awesome 👏 😎 .

[@indian5156]

same issue my phone that one done thanks

[@train4905]

A most superb video.keep up the excellent work folks.well done.

[@mr.kapoor1551]

Your working table is awesome

[@黄河-q9x]

emm,and I have the same one

[@heeyuntv8346]

Looks so easy but when you try, it's really hard.. Still practicing!

[@peverellpoulin5087]

Needs a lot of patience.

[@黄河-q9x]

But I can still learn a lot !

[@mobile1tech524]

This video very helpfull mobile tecknisian

[@rananuman9353]

very informative and helpful

[@supertechnical9203]

I have never seen before like u technicians in word u are great sir I salaute sir good job

[@pakfones]

I wonder that technology still not changed, i showed Nokia UEM Changing method in 2010-11 at my old channel *pakfones old* with basic tools. But i liked and enjoyed the method of soldering CPU same as i done in past without attending any mobile repair training institute.

[@opliukas]

What bonding pastr are you using?

[@train4905]

a most superb job.well done very concise and clear.thankyou so so much indeed for the information also on the power points to measure,thankyou loads,most most helpfull, keep up ,the superb work and videos.perfect.

[@hershkurdish895]

thanx alot for ur channel BRAVO 😍😍😍😍😍😍

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These guys are just more than the best

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1st comment to idol 😊

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You are the second

[@cambofixing]

Der Nik 😊

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These guys are just amazing! Nothing to say.

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Parabéns vc ganhou mais um escrito pelos seus vídeo 👏👏

[@Repairss]

Hello I have one Question ?

[@kurdduhok1635]

You are great teacher in the world

[@peverellpoulin5087]

And you are a great subscriber in the world.😁

[@train4905]

Superb job as allways.spot on.well done.

[@brothermobile9970]

How much hot/tem or air??? Quick 861DW HOT GUn

[@rostyc]

I have got one question- Can you read MacBook EFI firmware password using programmer or other tools? But not reset it, actually read the password? And how?

[@mrsemifixit]

Is the temperature used to remove cpu the same temperature used for removing any other ic on the board or do you go higher for cpu?

[@Nomad_Wanderer]

Yes it is just use a Heat Tape to protect tge surrounding area

[@train4905]

Awsome job😊

[@aaniketmalik8464]

Sir, how much air, temperature and timing have you kept? Please tell me sir

[@reyhanmanik2453]

Good job Rewa

[@dream_77707]

Bro what software do you use to open a Network locked phone??

[@mohamednismy1598]

hi , is the CPU you did change that you fix again or new CPU are fixed ?

[@manojjonam1223]

Hi bro big fan ......for technology plz.i want your advise..

[@aslamshaikh1640]

Very clear work 👍👍

[@ssmobiles1372-y2p]

pls upload android phones troubleshooting videos also.....urs video so nice

[@futureupdates7323]

Great work

[@joganandigp]

Ooooooooooooooooosome!!! Fault finding Great nice 👍👍👍

[@LukeSky74b]

Great video. Very nice skills.

[@rewatechnology2008]

Thanks for watching :)

[@faylin4874]

The best channelle

[@pradyekkarola]

I learn a lot on this video

[@rewatechnology2008]

Hope it helps you somehow :)

[@TeresaGonzalez-fz1en]

I took my broken iPhone to a phone repair company, they told me the cpu is bad. Can a cpu be fixed to retrieve data?

[@Mjridert93]

Sir, How to detect cpu problem.

[@sherrehman8457]

very good job sir

[@cavn007]

Good job

[@mrsemifixit]

What temp for using the wick to clean pads?

[@rewatechnology2008]

For reference only, with our equipment and environmental temperature, the solder iron temperature we applied is about 400℃.

[@mrsemifixit]

Why do you remove the black sticker from the shield before removing the shield? It will still pop off with it attached

[@MandangoGC]

withouth the sticker hot propagates easier, so less time applying hot and lower risk

[@mrsemifixit]

Juan Issa I’ve tried both ways and there’s no difference in time

[@vashusingh7176]

Broken CPU possible to repair and get the data from iphon

[@RageTurtle_Rage]

It must be hard to repair it when you have to sit all the way back and not get a close look so your head doesn’t get in the video. I had to do the same thing and I nearly broke my iPhone 6 I was refurbishing.

[@zoeychi1990]

Practice makes perfect. It seems they have many good masters! lol

[@rajkashyap4293]

grand salute sir

[@werepair-in]

Good sir

[@brothermobile9970]

How much hot/tem or air???

[@cK-Les]

What time is it plaisé

[@chudak27]

I thought it was the ram on top, cpu is the bottom layer? Am I wrong?

[@mortezaafzal3422]

very nice video

[@repagreen2640]

Very good vidéo How to use température for remove Cpu ? 🤔

[@yonesrasti287]

Repa Green its my question too but i found it in unionrepair page from year ago

[@repagreen2640]

yones rasti oh you have information ?

[@supertechnical9203]

Please sir upload video about basic method of motherboard tracing how do you know direct where is exactly fault plaese tell me about sir I am half technician of mobile

[@Kevin-jz9bg]

You don't need to trace the motherboard, just search up a schematic of the iPhone you want to fix. Make a list of the 16 power lines, and then CTRL-F to find which parts of the board you can access them. (And of course, find a ground point as well.) Once you find the part on the schematic, find it again on the PCB layout. Hope this helps :)

[@mdjabnur5548]

good job

[@miss4655]

你用的工具哪里可以买到？

[@gelodecastro8004]

what solder paste you use what brand

[@rewatechnology2008]

For the detail fo the solder paster, please check this link ( shop.rewa.tech/detail/low-temperature-lead-free-solder-paste-oem-new.html ) as a reference.

[@RanjeetKumar-xp7ub]

Sir apke India me koi beach hai kya please comment

[@abumahaamino7916]

Why iphone 7 3d touch not working

[@akmobiletechnical7851]

Nice video

[@phonefixhardware6784]

Hi. Van you geve ons in voltage that need to have lik by CPU_SRAM_VAR L1805 And PP_GPU_SRAM VAR. Thank you a lott I am one the flower of Rewa Respect

[@itstudio38]

А ОЗУ получается не нужно катать? Как без подогрева они сняли проц не «завалив» оперативку?

[@romanfunds]

за эту инфу 1499 просят :)))

[@apekspringkiera]

I wish i have that kind of hand

[@topmostvideos2618]

Sir i have iphone 7 with baseband ic issue which shows unable to activate screen and shutdown, if i borrow same chip with another iPhone 7 will it change imei? Or i have to program it or anything like that?

[@peverellpoulin5087]

Yes, needs to be programmed before install.

[@topmostvideos2618]

@@peverellpoulin5087 do we get orignal motherboard of iPhone 7?? Or if we fix chinese motherboard for iphone 7 will it work smooth like new?

[@OnYourSquare]

@@peverellpoulin5087Most of the chips on an iPhone are interchangeable. But he CPU, the baseband CPU and the NAND will have to be from the same device since they are encrypted together. The NAND is a special case. With a NAND programmer, you can read, write, alter or transfer data from the NAND. But dimoly changing the info on the NAND will not work. All three, the CPU, the baseband and the NAND all need to have the same data.

[@junaidsait2123]

Nice sir

[@Easysolutionbd]

nice sir

[@jawadel93-c7v]

so easy 😁

[@techofmicrosoldering]

😜😜

[@agittanav]

Awesome...

[@nishitgajjar4401]

Nice

[@abidgujjar3029]

Gud work

[@amanullahkhan1749]

I want to enter this course in the sir

[@rewatechnology2008]

OK. Then please fill the application form here: bit.ly/2VDxJ4c.

[@m2fix]

Goog work

[@sabroo65]

For buying a machine so you will help for I contact you

[@sabroo65]

I can't didn't find your number

[@branislavradojevic7898]

A10? I see a reference here...

[@gentilferreira9696]

Fera!!

[@Leonistech]

How to bypass iCloud!!!!

[@brando12343]

Leonard Sylasani you can’t, batter to either part the icloud locked phone you have out or sell it as parts, you can hardware unlock it but it’s super hard and very expensive

[@scoobyquadcopter9264]

Any company’s in uk doing this ? Got a dead iPhone 6 anybody fancy the challenge of repairing it

[@jonasdearaujo5096]

Show!👏👏👏👏🖒🖒

[@ThanhNguyen-pi9ry]

*c ic ?

[@mobile1tech524]

Hi sir

[@hendyliu9849]

Master

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Soooooooooppererrrrrrrrrrrrrrrrr

[@handyfeikor3149]

干得好兄弟！

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Rewa👌🏻👍🏻😘

[@hackileo]

First fr my country

[@Mr.Morkovkaa]

щас пионеры посмотрят это видео и побегут валить трубки,подумав что все так просто и легко сделать)

[@davisdai2385]

no.1

[@rizwan_____]

2nd

[@TIMETECH07]

First!

[@mdsohel1249]

I like u

[@jeanyves8035]

I had iPhone 3Gs with same problem, just dead already. Should i reball the cpu ?? 😂😂😂

[@peverellpoulin5087]

Try to troubleshoot before reballing CPU.

[@user-px8in7dk1p]

Me watching 2024😂

[@rewatechnology2008]

Hope it can still help you acquire new knowledge.

[@ahmadtsaqib7700]

1 unlike by apple employee

[@rewatechnology2008]

Two apple employees now. 😂😂

[@axel3093]

I dont understand a damn thing!

[@quochoanduong355]

H

[@maxiherbal]

😘😘😘👌👌👌👌

[@peimanhamrang5765]

Unprofessional! No need to break the shield to remove U2 and even tho no need to replace with the new one to see if it’s ok! Just remove it and turn it on if it’s the u2 then the device turns on and enters a loop, anyway you could realize the cpu issue by measuring the feedback line when it’s not connecting to the cpu right then fb line is 4V !

[@ladbla1752]

Can you explain a little more this: "anyway you could realize the cpu issue by measuring the feedback line when it’s not connecting to the cpu right then fb line is 4V !" Thanks

[@mobile1tech524]

Good job sir