My monitor problem all started after my screen totally froze one night and I had to shut the computer down. Then when I turned it back on, all I had was a black screen. On the third attempt, I waited a little longer and finally the monitor came on. It has done this every time since then. It takes between 5 and ten minutes to come on. Could I have done something to the settings? If so, how do I get to bios on a Dell Dimension 4400 and then what do I do once there?