Thinkpad t42 malfunction
I have an old IBM Thinkpad T42 it worked fine for several years. but recently it started malfunctioning. Whenever i shake it the screen goes black and the laptop freezes. If I take out the battery and put it back again it starts up every time. I disassembled it and checked everything but i coudn't find the cause of the malfunction. I think something toutches the metal frame but i coudn't find what does it. Can someone give me any idea what's the problem is?