Phone is powered on, but the screen is black
I have an iPhone 6 that had a mashed sleep/wake button that was no longer able to move. The phone was powering on but the screen would stay black (not even a back light). I’ve replaced the button/ribbon cable thinking that it was stopping it from waking the screen.
The new sleep/wake button and ribbon cable are working (iTunes recognizes the device is in DFU mode after doing the hard reset with the sleep/wake button and the home button) but the screen is still staying black - even after doing a recovery update in iTunes.
I’ve tried using a few cracked screens as a testing device to see if they light up but still have the same results.
Is there another trick to try, or is this down to a failed chip?