I have a Blue Mac Tower G-3 (6 years old) and all of a sudden when I turn on the computer the screen on the monitor remains black. The monitor has power as the power light is on. The monitor is a ViewSonic CRT Model V70f+ and is about 2 years old. The little battery in the computer has never been changed. Is it possible that could be causing the problem or is it something else. Obviously the monitor could be bad, but I'd wondered about a computer problem? Anone with ideas? Thanks in advance.