Is my monitor busted?

I have a 17" Azura CRT monitor. I have never had any problems with it, but this morning I turn my system on and the screen is going crazy. The picture was shaking really fast at my normal resolution of 1024x768. It is reduced to a slow wave at 800x600, but I still have to shink the size of the viewable area using the buttons on the front to it's minimum just to fit everything in.

I changed video cards in it to see if that was the problem. Normally it has an ATI Rage Fury in it but currently it is using an S3 Trio+ (very old). The problem seemed to have improved slightly but certainly is not gone.

When I reboot in DOS mode the center of the screen look solid but the edges still vibrate and the viewable area is still way off.

So based on all of this info, is my monitor dead in the water? Can it be fixed or do I need to buy a new one? Is there something else in my system that could be broken like my motherboard or anything?

Any help is appreciated.