Hi Rany. Your description sounds like the issue i have.
iPhone 5c dropped all works but the screen/touchscreen. Tried a new screen but no luck.
How can I check if its the backlight issue? (but lack of response from touchscreen makes me believe there is more to it)
Kind Regards
Is this a good question?
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Hi Daniel,
So your phone doesn't show an image/or backlight AND touch is not working? Are you sure it is a drop, not liquid damage? Back light, image, and touch are 3 different functions with somewhat different "circuits" on the board. They may both be damaged, but more often it is just one of the 2. I'd start with the following:
- There are 3 screen connectors on the board. Clean them with a cotton swab dipped in 90%+ isopropyl alcohol. Then try reseating your screen and re-booting your iPhone (press & hold home + power buttons for ~12 seconds straight then restart your phone).
- If no change, remove the black film (very carefully) around those connectors on the board and look under a magnifying glass for missing/broken/part removed components.
- If you see nothing wrong, try a KNOWN GOOD display, something that you know for sure works on a different device. OR transfer your logic board to a known good phone. Let us know what you find out at this point.
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Before going crazy with diagnostics, try this, disconnect battery for a few moments and then reconnect it.
by Brad
Actually cleaning and reseating fixed it for him.
by Rany