hi guys...i'm facing a problem but i dont know what causes it. When i switch on my pc, my monitor says that display is not connected(the message we get when the monitor alone is switched on without turing on the CPU). But this does not happen always. When i contacted my dealer, he said it may be due to a faulty RAM. By his advice i used to remove the RAMs and clean its contacts and place it back into the slots. after some trials i get the display back on. then it works fine for some days and again the process repeats. Now i have replaced one of the RAMs with another which he said is tested to work and still face the same problem. Now what could be wrong?
Thanks

Thanks