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No response when I touch the screen.

This morning my iphone 5s still works well.

Suddenly, it's irresponsible when I touch the screen. I mean, the screen still light, but it's irresponsible for my touching.

Now I'm sure it's not the problem of the screen, cause I replaced 2 old screens and it's still irresponsible for my touching. (I have the tools, and I replaced the screen twice before).

Now I'm frustrated. I realize maybe it's a big problem this time.

Hope someone can help me, teach me which part probably is the problem this time, could I replace it ?

Thanks..

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when you say you replaced 2 screens before do you mean glass or digitizer and glass or glass digitizer and lcd

Sep 27, 2015 by Jimfixer

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Posted: Sep 27, 2015

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If other known good screens did not fix this, and it did not happen right after an upgrade to a new iOS, you probably have an issue with the touch function circuit on the board.

This means it could be the connector has come off, but since you tested 2 different screens, this is not the case.

It could be the connector on the board, but usually lines and boxes may appear on the the screen as well in addition to loosing touch function. Not to be ruled out though.

Then there is the circuit leading to the touch IC, including caps, resistors, crystals, etc.

Finally, the primary touch IC itself, or other IC's, even the PMIC.

If you want to troubleshoot it properly, you will need to determine what board you have (there are 2 models), pull the schematics, and follow the path. Not easy, time consuming, and often daunting if you've never before done something like this.

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iPhone 5s

No response when I touch the screen.

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