Hi, I'm after some thoughts on a problem I'm having with my PC:

All of a sudden, the PC struggles to start up. Most of the time, I get no beeps, followed by blank screen - monitor goes into standby mode.

Occasionally I get a kind of muffled beep, and it gets to the motherboard splash screen or device listings, and then freezes.

Also occasionally, it beeps once and boots up fine. However, Windows freezes after a seemingly random period of time and I'm forced to switch it off.

These problems haven't followed any upgrade or anything.

I've tried:
Reseating the RAM - no joy.
Swapping the power supply - no joy.
Swapping the video card - no joy.


So, what looks like the problem, in your opinion? I'm thinking the Motherboard but just wanted your thoughts before I shell out for a new one.

Thanks.