Can't boot from my battery

Hi guys. I have M17x R4. I have this problem where i go to school, turn it on and all the lights come on like normal except for the screen and then it beeps 8 times. This is on battery. I then googled what that code is and it means an LCD failure. Then i plugged it in and it worked perfectly. I can even unplug it from AC and it will still work fine. So the problem is that i cant boot from battery. Does anyone know a solution to this problem that doesnt involve ordering new parts or things like that? :(