ipad 3 keeps locking/unlocking

i repaired the screen on this ipad 3 only to find that there was a deeper issue. it wouldn't turn on further than the apple icon and there was an error message in one of the corners. found out that the error was saying i needed to put a new front camera in so i did. now the device charges till it turns on, then stays at 1%. it also keeps unlocking and unlocking. has anyone ever experienced this?