I'm building a new computer with an ASUS P5KPL-CM motherboard with an Intel dual core processor E5200. It seems that the computer won't boot about 1/3 the time; no beep sound from the speaker and nothing on either the onboard display or displaying on the PCI express video card. The rest of the time the computer boots normally with no error messages. In checking the voltages with the supplied hardware monitor in the bios the 12V reading was 11.721V. I replaced the power supply and it is now 11.881V, yet the computer still won't boot 1/3 the time. Is the motherboard toast or do you have any suggestions?