Computer Not Started. Keyboards Lights Are Working.. No Display. No Beep Sounds

[suduie]

My computer refuses to start up. When powered on, the monitor light flashes (as though it is on but receiving no signal) and the num lock, caps lock lights flash. There is no Beep Sound. The cpu fan is working, and i have tried with a different hard drive and it still does this. So its not the CPU or the Hard drive. Ive tried unplugging the cd and fdd but have the same problem. I remove RAM and VGA too. But there is no any beep sounds also. Im beyond lost. Does anybody know how I can fix this?

[regentblogs]

This could be the fault of motherboard. Check whether any short with the casing too. Sometime problem with the RAM also. sometime some RAM card not giving error sound although they are faulty.