So, I'd wanted to hit the "reboot" button but pressed the Power button instead and the pc turns off. However, right after that, I could no longer turn on the pc again.
The pc itself is plugged into a UPS(which is connected to a surge protector) and I've tested that particular socket with a lamp which worked fine. I also plugged the pc directly into the surge protector and no, it didn't turn on either.
Anyways, the "Yellow LED" is kinda blinking: it blinks only when the Power Connector is connected and even if the "0" switch is on.
Just a question: should I test another power supply with this pc 'cos I'm a little afraid that if some other parts have been damaged too, they might kill the PSU too?
PSU: Seventeam ST-520PAF
Motherboard: Some esys 945GC-X which is practically a rebranded MSi motherboard. Not sure which MSI model.
CPU: P4 3.2 ghz