🚀 go-pugleaf

> 
> What would be the most like cause of this problem?
> 

Something died in the red video amplifier.  I'm assuming you tried your
computer with a different monitor, so that you know the red output is OK.
I't possible, but much more unlikely, that the red gun is out in the CRT.

The most likely thing, especially given that this is a new monitor, is that
you experienced a CRT "flashover" (internal arcing, common during the first
day or so of CRT life, esp. after it's moved) that took out the output
transistor of the red amp.  You might want to look for the simple things
first, though - make sure that the internal video cable (if any) is still
attached at both ends, and that the external cable (esp. if attached to the
monitor) is OK.  Wiggle the cables and see if the red flashes back on briefly.

Diagnosing the fault in the video amplifier should not be attempted unless
you know your way around high-voltage equipment with an oscilloscope.


Bob Myers  KC0EW   Hewlett-Packard Co.      |Opinions expressed here are not
                   Systems Technology Div.  |those of my employer or any other
myers@fc.hp.com    Fort Collins, Colorado   |sentient life-form on this planet.