17" CRT monitor question

I've had this monitor for about 7 years and it's always been reliable. It's a KDS that I normally use every day but transferred it to my work bench to use as the monitor of choice when building or repairing other computers now as my everyday monitor is now a Dell 19" LCD type which takes up less room on my desk.

The last few times I've used the KDS monitor hooked to various computers, I've discovered that the screen is now yellow-green during the bootup where you would normally see the black and white bios info before getting to the windows desktop......and everything there has a yellow-green tint to it as well.

At first I suspected that it was because of older video cards that had gone bad and swapped those out, with the same results on screen. I have older 14" monitors here on a shelf that are also 'backup' types, and when I hook those up, the screen comes in with the correct colors. So obviously it is the KDS having problems now.

Is there anything that I can do to fix the KDS? I've never messed around with repairing a monitor and don't know if this is something I could do (I've heard other people in here talk about degausing (sp) a monitor and have no clue what that is or how to do it, but if it's something not terribly complicated and can be done to revive the KDS, I'm willing to give it a shot rather than just dump the monitor out to the curb.

I hate the idea that some really antique 14" monitors here have outlasted and outlived this one. Kind of like putting an old dog down who has given years of kindness and companionship.....Strange to think of a computer component as an old friend, but this one really feels like one to me. LOL

Is there any hope here? Or have I unintentionally worn it out by using it with so many different systems over the last year or so?

TONI