hey everyone i have a lenovo G500 laptop this morning i was cleaning it up and i found out that 2screws were missing so i got some old ones from my old laptop and placed them there i also forced a bit on all the screws just to make sure they dont fall out but when i tried to turn on the computer the screen stays black the battery and power on lights + the camera light turn on the fan also turns on but shuts down shortly after that, pls help me thank you in advance.