I was on the same problem that the power button not responding to the short press to enter sleep mode/ wake. It will work only for "the slide to power off" option. But I noticed that after specific time it is going to sleep mode. So I realised it is definitely a setting.
I have done all the things saying to do in the hardware side like covering with tapes, new flex cable, etc, etc
None worked for me
THIS IS JUST THE SETTING OF YOUR IPAD. ( mine is the ipad mini4)
'''GO TO SETTING
-> GENERAL scroll down to
flip that bullet to make sure it is off. Now try..
The power button will work as normal. it is nothing wrong with the new screen or digitizer you replaced.
if the home screen is not showing up at all even through home button and power button then it is definitely the small sleep wake sensor. you may forget to transfer it to your new digitizer. check it
Now the software update is making me crazy that unable to verify update.
if you have any suggestions please share it
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i took off my digitizer then i left the lcd on my ipad when i pushed the power botton nonthing happened when i hold it then it wants to shut off but it wont work when i click it... does anybody know whats wrong
da Giovanni Rosado
try to disconnect battery for some time. it will real shut down of device. and usually help in strange cases if nothing had damaged during repair.
Disconnecting the battery didn't work for me, but I'm thinking it could be a software issue because the button works (to turn the device on and off, but it doesn't work to click the screen on and off).
da Lindsay Anderson
I have the exact same issue. It works to power off, or soft reset, but not to "sleep"/lock iPad. Did you come up with a solution? Already tried reconnection of power btn flex, iTunes restore, even another touchscreen because it was working fine before screen repair.
da Ruben Villarreal
Cover the home button flex with Kapton tape or electrical tape. The sleep/wake function is on the home button flex.
Test the screen and the lock function with the screen held away from the frame (but connected) and see if it works. If it does work with the screen off the frame cover with tape if it doesn't work it's a bad solder on the home button flex and would need another touchscreen or resoldered.
Lots of good advice the whole way through this thread.
da James Fors
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