hey i hav ean idea.. does your motherboard have onboard vid? if it does, take out the vid card completely and attach it to the mobo slot... perhaps that could be a way to check out if it was seated properly or not? i have an asus and it does 1 long beep 2 short beeps when the ram wasn't seated properly (dunno if it would be the same), so maybe you should try taking it out and putting it back in.. if that doesn't work.. take it up to a computer shop, they can test the mobo for like $15 (at least at the place i go to )