I don't have any internal leds, not on the mobo and not on the psu itself.spiralfive said:You could manually trip the motherboard to make it come on. Open it up and see if there are any LED's lighting up on the motherboard, especially any NIC cards (you could see those outside of the case). If they're on, you know there's something wrong with your power button or motherboard.
To trip the power button, get a flat head screwdriver and touch the two connectors that lead out to the power button (you'll have to remove the wire to do that). If you do it correctly, the computer will come one and you'll know that the power button is screwed up. What kind of case does your computer have?
my case is an antec sx630