> Now only today, I had a mediatek wifi card laying around…
> I even > unplugged everything and put them back in, and still it's not POSTing Have you tried slowly troubleshooting by pulling out all the cards, then putting in one thing at a time and trying to post it each time? PCI cards are notorious for going bad after a decade+ and taking out the whole box with it. I recently went through something similar with an intel PCI nic (granted, its 20ish years old now and has seen some abuse)… I encountered kernel panics randomly until I yanked the card, where it worked fine for literally a decade before that.
