I am working on a 19" Kortek monitor. Quite frankly, this thing's a piece of crap. Quality aside, this monitor was brought in to me because it was only displaying red. I checked the driver transistors, tried replacing them, no luck. I also replaced a couple of ICs, no luck there either.
I also checked all the obvious, including the wiring and connectors, no broken solder joints there...
As a last resort, I hooked up the rejuvinator and checked all of the colors. I was able to rejuvinate the red and blue gun, so now we have a nice clear picture that is still missing green. The emission life test on the rejuvinator shows that after rejuvination, red and blue have a 12 month or longer life left in them. The emission life test for green, however shows that there is no emission. Since I can't find anything wrong on the chassis, I think the green gun is dead.
Is a dead gun fixable? My rejuvinator won't let me "shoot" this gun. It says it has no emission.