Strange screen problem(s): no image on the LCD
Over the last couple of days I've encountered the same problem on two different iPhones.
First one: I replaced the power button, put everything back together (original screen assembly) and the LCD stopped working. Also, I was getting the charge sound every 5 seconds when plugged in. Disconnected everything, put it back together after 30 minutes or so and the LCD powered up, got an image but the digitizer didn't work.
I tried replacing all the other components, even moved the logic board in another iPhone 5 but no luck. I believe something got damaged on the logic board but I find it strange that sometimes the LCD would work.
Second one: I replaced the screen yesterday, fitted a replacement copy assembly, phone worked ok until today when it suddenly stopped working. Same problem, the LCD is not turning on, the phone works ok in the background - this one doesn't do the charging sound every 5 seconds. I tried replacing the screen, I even fitted an original assembly but nothing worked.
Has anyone seen this kind of problems before? Thanks.
Is this a good question?