The same problem, only, I replaced it with the new display and it worked on the test, it did the problem once when the screen didn't work after a restart, then I disconnected it and reconnected, it worked.
The next day I changed the battery, but it didn't work anymore, it starts up because the sound is heard when I connect the charger. I checked all the plugs, all the circuits on the screen and it is intact and new. what to be?