Last Sunday my computer stoped working, it still boots up and all, but I'm not getting any graphics on the screen. Yet my monitor is still working fine. And it makes a series of four beeps. I took off the panel and looked at the video card, thinking it might have been lose. I talked to two friends of mine and both thought there was a problem with the graphics card. I moved it around a little and after a couple of tries it finally acted normal. To test it out I played my flight simulter for several minutes and it acted fine. After that I thought it was fixed, and I looked to test my sound to find my sound port. Then the screen frooze and acted funny again. Can anyone help? Any suggestions?