iphone 5s no power on dead - GSM-Forum

Albelektronik · 03-23-2017, 13:00

Hello all,

iPhone 5s, no water damage, is not heating, totally dead.
U2 IC replaced, after this power IC replaced, still the same.

i got not any cap in short.
Any suggestion?

Regards, Carmelo.

Pallle · 03-23-2017, 13:09

Hello

How many the current consumption from external power supply?

Albelektronik · 03-23-2017, 13:20

Hi Palle, thank You for your quick answer.
just 0.25A, i think is CPU.

Pallle · 03-23-2017, 14:06

Check the current without U2 ic, if lower, you need replace again.

Albelektronik · 03-23-2017, 14:15

Almost 4 changed, 2 from them from original motherboards, no results.

Pallle · 03-23-2017, 14:24

I think 0.25A is enough to warm... check with freeze spray.

Albelektronik · 03-23-2017, 15:02

Quote:

Originally Posted by Pallle

I think 0.25A is enough to warm... check with freeze spray.

tried with imaging camera, cold.

Albelektronik · 03-23-2017, 16:18

Ok, CPU damaged, someone work previously, the balls are our and the flux trace are there. Thanks Pallle for Your help.

abukuru · 03-26-2017, 10:56

Is there any solution for the damaged cpu

Sent from my iPhone using Tapatalk Pro

Albelektronik · 03-28-2017, 16:23

Maybe using the CNC machine, i have not try yet

Did any?

03-23-2017, 13:00	#1 (permalink)
Albelektronik No Life Poster Join Date: Sep 2005 Location: London, UK Posts: 694 Member: 178513 Status: Offline Thanks Meter: 109	iphone 5s no power on dead Hello all, iPhone 5s, no water damage, is not heating, totally dead. U2 IC replaced, after this power IC replaced, still the same. i got not any cap in short. Any suggestion? Regards, Carmelo.

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03-23-2017, 13:09	#2 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	Hello How many the current consumption from external power supply?

03-23-2017, 13:20	#3 (permalink)
Albelektronik No Life Poster Join Date: Sep 2005 Location: London, UK Posts: 694 Member: 178513 Status: Offline Thanks Meter: 109	Hi Palle, thank You for your quick answer. just 0.25A, i think is CPU.

03-23-2017, 14:06	#4 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	Check the current without U2 ic, if lower, you need replace again.

03-23-2017, 14:15	#5 (permalink)
Albelektronik No Life Poster Join Date: Sep 2005 Location: London, UK Posts: 694 Member: 178513 Status: Offline Thanks Meter: 109	Almost 4 changed, 2 from them from original motherboards, no results.

03-23-2017, 14:24	#6 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	I think 0.25A is enough to warm... check with freeze spray.

03-23-2017, 16:18	#8 (permalink)
Albelektronik No Life Poster Join Date: Sep 2005 Location: London, UK Posts: 694 Member: 178513 Status: Offline Thanks Meter: 109	Ok, CPU damaged, someone work previously, the balls are our and the flux trace are there. Thanks Pallle for Your help.

03-26-2017, 10:56	#9 (permalink)
abukuru Freak Poster Join Date: Dec 2015 Location: nigeria .benin Posts: 248 Member: 2495283 Status: Offline Sonork: gsmvilla.com Thanks Meter: 12	Is there any solution for the damaged cpu Sent from my iPhone using Tapatalk Pro

03-28-2017, 16:23	#10 (permalink)
Albelektronik No Life Poster Join Date: Sep 2005 Location: London, UK Posts: 694 Member: 178513 Status: Offline Thanks Meter: 109	Maybe using the CNC machine, i have not try yet Did any?