My dad's old XP Medion PC has been powering off (instant shutdown) whenever someone watches a long Youtube video or downloads more than a couple of files in tandem (in firefox).
I have replaced the power supply to no effect and checked for loose bits inside. While checking I found the card that connects monitor via VGA has had a small fan on the underside come loose (image in next post).
Would this be enough to cause the constant shutdowns? The PC is borderline steam powered (P4) so the little fan could of gone years ago and have nothing to do with the new problems.