My friends PC was not working few days back...nothing appeared on monitor. So he detached the RAM, cleaned it and attached it back. Then PC started, XP was loaded and suddenly PC went off. Now the PC doesn't start.
When we hit the power button light flashes for fraction of second and then it disappears. Switching it on doesn't affect the fans and there is no BEEP sound. And the Motherboard has the power LED ON.
So what can be the reason behind PC not starting?
PS: Its an ASUS motherboard.
Those are typically signs of a failing/failed PSU. So borrow your friend a PSU or try another one from a local store with a good return policy.
You can also try to Clear CMOS, here's a good video with several options and most ASUS have a CMOS Jumper; see -> http://www.youtube.com/watch?v=rdHH9KrceR0 ; ignore the MSI the principles and methods are universal.
IF the 'new' PSU fails then let me know, or try to breadboard; here's a simplified breadboard:
You can try Lazyman's Breadboard -
* Disconnect ALL Front Panel & USB Headers ; keep only the PWR & Ground <best> short w/wire.
* Disconnect ALL peripherals including the Keyboard/Mouse
* (1) Stick of RAM in the second DIMM slot from CPU
* Unscrew both the MOBO and PCIe screws
Pull the MOBO away from anything conductive and supported by a towel ; short PWR & Ground to start.