Hi All, I have a monitor that wont seem to start properly. 1998 Fadal 4020. Serial# 9808550. I have read through some the posts here and I am having no luck trying different things. The monitor has power to it as there is a single white (vertical line) in the center of the monitor from top to bottom. That's it.....I tried messing with the vertical hold, brightness, etc... and quite a few potentiometers on the back and bottom of the monitor board. Nothing..... Can anyone lend a hand with some guidance here? Thanks in advance! JoBwan.