A quick PSU related question.

[dirmaster0]

It's dead. The PC that is. Upon pressing the switch nothing happens. I think (correct me if I'm wrong) this can only be due to a faulty PSU or a totally dead motherboard. Or the button itself. This last option seems a bit far-fetched to me.

Anyhow, does the PSU fan spin if the motherboard is dead? Because appartently the on/off switch goes through the board to give the signal to the PSU. Could it thus be mobo's fault?

I intend to try running it with a borrowed PSU - the easiest and fastest way to determine the culprit.

The PSU's fan works independent of the motherboard--If you have a damaged motherboard theres components that could still be working (like lights displaying, etc.)

Chances are if you replace the motherboard it could fix the issue, but it wouldnt hurt to replace the PSU as well. Worst comes to worst and the issue occurs again after the replacement of both, it could be the processor fried out too (CPU).

I use to have an AMD Athlon Thunderbird CPU w/ an ABIT NF7-s 462(A) Mobo, worked great for 3 months (played BF1942 without any issues)--One day I turned the power on and it turned off immediately, followed by it ceasing to power on. Upon further investigation inside I found that the CPU chip actually broke in half (diagonally across the entire chip) which was from a faulty PSU which couldnt take a power surge one night (although it was plugged into a UPS).

Long story short, it could be the PSU, the Motherboard, or even the CPU.
The cheapest option depending on how new the PSU/Mobo would be is to buy the cheapest of those first, try to replace that part and see if you get the same results, if not go from there and get the next item (leave the CPU for last).
If you lived in MN I could check it out at the shop, I fix computers for a living and we have spare parts for testing like this case

Good luck!