Im not sure what could be at fault for this problem, so I thought Id see if any one here would know.
When my computer is booting up, just after the bit when it shows the XP logo and the loading bar, and it goes to the login prompt (I use the classic login prompt, not the welcome screen), this happens:
It only happens for a second or so, and then the monitor clicks, and it goes to the login prompt.
Im not sure whether its a fault with the graphics card or the monitor.