Agree with the other answers here. The ribbon cable is exposed between the volume-lock button and the power button and is very susceptible to being torn. Especially if you are not using caution when lifting the digitizer off originally, I've done it plenty of times.
I even had the ribbon tear in the same spot just from touching exposed adhesive. As soon as I lifted the digitizer to reposition it, the adhesive grabbed the exposed ribbon and ripped it right off. I circled where to look below.
A few questions to see if I can help further:
1. Have you adjusted/replaced/done anything to that volume/power cable at all?
2. Does the volume-lock and/or volume up/down buttons still work?
Another issue I have run into is if you tighten the screws down too tight on this cable (be it the volume section or the power section) the buttons wont work because they dont have wiggle room. You might want to get below the rear-camera and try loosening the two screws holding the power button just a tad. One turn out, one turn in; just try to play with it a bit to see if it works.
The benefit of fixing an ipad is that you don't have to have the digitizer or LCD set in to the housing to test these things over and over. The only thing you cant use during the testing phase is the home button (and there are ways around that too).
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Hey I change the digitizer on my iPad 2 then power and volume nothing was working , I replace the control harness and still not working then I change the power supply board and still not working , plus it doesn't lock with the case , I have no idea what else to do , help
Does anyone have an idea of why my iPad was working perfectly one morning, left on charger and unused during the day, then won't work at all that night? It will not turn on; pushing both buttons at the same time for over 30 seconds does nothing; tried different power cords with no result; even took it to an Apple store for them to look at it and all they said was to buy a new one because the board was probably dead. I haven't taken it apart yet but am not afraid to if I have to. It's 3 years old and warranty has expired, so no bid deal. I'm just not ready to shell out another $800+ for a new one if it's only going to break for no apparent reason in 3 years. Thanks for any help or suggestions!
I had i similir proble ipad would not turn on dont know why. I had to open it and take of battery. Then it was back to normal.
из Omar Mendoza
Hey the home button prob is nothing to do with the power button. There are two very small metal pins by the area the home button sits on the cable connector. One of these or both have been knocked off while replacing. You need a new cable connector unit.
из DIGI GENI