I was attempting to put an agp video card I had sitting around into my parents HP that has windows XP. I disabled the vga adapter on the motherboard and set the video setting to vga. Then I installed the agp video card. it beeped 3 times to tell me that it had "bad video memory", but that isn't the problem. I'm not really not very concerned about installing the video card. I can now not get a picture to come up when it boots. It shows the HP banner and then shows the XP booting screen and after that the monitor goes blank. It appears to continue booting but there is no picture. I assume this is because of the adapter being disabled, but I do not know how to enable it again. I was told to try looking in the bios for a way to enable it and nothing has any effect on it.