Must take out the battery in order to boot

I have an Acer 6935g laptop with windows 7. When I go to boot my laptop, it powers on but nothing shows up on the screen, unless I take out the battery and put it back in few seconds later and then power up. I have to do this every time in order for it to work properly. I have tried a clean reinstall of windows 7 and have flashed an updated version of my bios but still the problem persists. I would appreciate if anyone had any help or advice that might solve this problem. Thanks Conor