Computer won't turn on.

[Lawrence2007]

Hi Guys,
I have a Compaq D510 SFF with 1.8 P4/256RAM/80Gb IDE HDD , which isn't turning on, no motherboard light, no sound, no nothing, just blank.Then a few hours later everything would be fine, its been doing this for about two weeks now. If any of you have any suggestions it would be much appreciated.

 

[gavinseabrook]

Sounds like a Power Supply issue. Try to remove the power cable, wait 15 seconds so it can drain the power, move the voltage switch (red switch on back, you will need a pen or flathead) to 230, wait 10 seconds then move it back to 115. Plug in the power cable and test it.

 

[iss]

I would agree the most likely culprit is a defective PSU.