If it's showing up in the bios interface then it's your graphics card. It could be a couple things, but my first impression is that it's overheating, so I'd check to see if the fan on it is clogged up, or that it is at the very least actually working.
BTW, for future reference don't forget to post your system specs. It makes things a lot easier to help you out when those things are mentioned at the start. In this case it would help to know what motherboard you have, and graphics card.
