What makes you think so? Memtest runs fine. ODD is disconnected. Pc posts even if HDD is disconnected. I get the correct beeps if I remove the memory. There's nothing more I could disconnect. At this point in time I only want to know if I'd be getting the pc to startup next Monday. What's weird is that I get the pc to POST and windows to start only if I spray that cold-spray on the motherboard. I've removed all ancillaries and everything's still the same. The only thing which remains is the PSU and for obvious reasons I can't run the pc without it since I haven't got a spare. Though I'm quite sure it isn't the PSU... just a feeling I have.