My pc stopped turning on one day. I did some research and found out that it could be either the psu or motherboard. I've done the paperclip test and it worked but a veteran on this site informed me that a paper clip test wasn't a really sure way and that i should get a power supply tester. However, im really conservative on money and only want to spend whats absolutely neccessary, so i plugged my psu into my cousins pc. His motherboard was able to power on ( although it wasnt connected to any fans or hard drives, just like my pc ) with the an LED mouse and a keyboard plugged in. Does the fact that this other motherboard was able to power on mean that my motherboard is no good?