Chosen Solution
Ipad 8th Gen 10.2 removed working screen (but broken) - LCD was broke but turned on and digitizer shattered. I removed digitizer and LCD took an LCD used but verified working in another ipad I couldn’t fix due to hardware failure. I removed digitizer, removed LCD disconnected all cables, reconnected LCD and also reconnected digitizer, when holding power button it doesn’t come on. Also, when plugged into the PC it doesn’t appear to recognize the A2270 ipad that I am replacing LCD/Digitizer on. I removed battery screw but didn’t mess with anything with the battery yet. I also tried putting both LCD’s in the ipad that the board I believe is bad and it won’t turn on, on that ipad either. I tried software reset holding home+ power button and I don’t get anything. Has anyone ran into this with a known working LCD? I don’t see anything obvious with the naked eye.
As Jesse has pointed out, you probably shorted logic board in the process since battery was not disconnected, take it to a reputable technician who specializes in board level repair if you don’t have the tools/skillset to do yourself.
