Hello ok i have a nvidia gt 520 that i want to put in i had it working before but i took it out because i needed a better powersupply. i got the powersupply and i put it in again hooked it all up and turned on my pc the desktop turns on but my monitor never gets a signal can anyone help i have changed bios before because i needed to boot with a cd once and i forgot the key to the two column menu that then you can select bios. so i need either to get told the key to press i cant find the right one anywhere but im running on a emachines windows 8 preview right now just got it did the same thing with windows 7. thank you ahead of time.

hey i have a warranty on the card should i take it back?