Touch is not working. Missing a voltage?
More of a technical question... I have an iPhone 6 with no touch. Before lifting cumulus I was poking around for voltages and am missing PP5V1_GRAPE_VDDH. There is no short to ground on that line.
I pulled U1501 and replaced it with one I had on a doaner board that might have been bad. I lost all image on the screen but had backlight after that.
Retracing my steps, I reballed the original U1501 an stuck it back on and the phone is back to how it was.
Should I order and install a new U1501 or is there something else you would advise me to check first?
Thanks all and happy repairing!
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