Electronic – How to make a VGA monitor display a white screen at all time


I am hacking around with an old (CRT) VGA monitor. Trying to make an oscilloscope.

What I want is to make the monitor display a blank white screen at all time, when the power is connected of course. I do not care if I cannot use my monitor for its normal job anymore.

Is it possible to short some pins of the VGA connector to mimic a blank white screen?

Best Answer

In VGA, the RED, GREEN and BLUE signals are analogue, in the range 0-0.7V. To have a white screen, you'd have to supply 0.7V to all three RGB inputs.

I'm not sure about HSync and VSync, in the worst case, you're going to need them as well in order for the LCD monitor to display anything.