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Repair information and guides for the fifth generation of iPhone. Model: A1387

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iPhone 4S gets hot without any reason.

Hello,

I have a problem with my iPhone 4S. Suddenly three days ago it gets hot without any reason.

After some tests I can tell you that it gets hot when

- the screen is on (even with iphone in airplane mode)

- the iPhone is charging (and screen is off).

Note that the warm side is the motherboard side.

When not charging and screen off , it is OK (cold).

To be sure that it is a hardware problem, I restored the iphone with the latest iOS (from 7.1.2 to 8.3) and the behavior is the same. It doesnt seem to be a software problem.

Have you any idea about this issue ?

thanks

Sergio

Answer this question I have this problem too

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Can you observed any liquid damages on logic board? if answer yes : clean the logic board and try

if answer No, Check with anther Display module and let me know the result (according to your description i think fault coming from your LCD backlight or backlight driver)

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Thanks for your reply.

Not sure it could be that. when charging the screen is off but iphone hot.

at the moment I do nothing because the iPhone is usable as it is. I will see next week-end.

[Edit] The component which overheats is just under the A5 chip. It seems to be a chip called D1815A4-C23-VAN2 (but obviously not sure).

I dont know what it is. Some russian site sell it !

http://i-chasti.ru/iphone-4/98--iphone-4...

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Sergio Bzh will be eternally grateful.
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