Video Card Not Recognize

I Have A Radeon 9000 (AGP) TNT2 (PCI)

And they all Use to Work just fine on my VIA motherBaord
But one Day i shut off my computer TO take the videocard out and Put it back on and the Screen Just Stayed Black and the Vid card wasnt working

So i tried putting in my TNT2 Vid card and it didnt work either So i went to Go test THose 2 Video cards Out on my old computer And they worked Just fine

So at this Point i have 2 Working VideoCards And 1 MotherBoard Not Recognizing them even though it did 5 minutes ago...

I did do a little Tweaking Around With Overclocking and such, So i Reinstalled The computer... No luck still the same Issue, At this Point Im running Inboard SV Savage PRO 14mb!!! wooo!!! sure isnt 128mb DDR

If u can help me I would Really Apreaciate it becasuse i dont want to have to buy a new Mobo,Processor,Ram,Powersupply or have to search for 2 years to find a mobo Compatible with my Computer HardWare
Stupid Compaq i swear they have a timebomb in them