My PC will not start. Does not enter BIOS. No beeps. The CD ROM and hard drive power up. How can I test whether it is the board, the memory, the processor, or the PSU? I have no one to swap components with. Is the processor the most likely cause? I have checked that everything is plugged in right (I built it myself). Socket A system. I have no idea what to do and cannot afford a professional. Can anyone help?