Yeah, I'm afraid it looks like your CRT
You say the other monitor worked?
It may seem the other one just needed a bit of correction in its own part, and wasn't a fault with the system.
The one your using now on the other hand looks like its its own fault.
If you can though, and its detachable, try switching the cables round, so that the other monitor uses this ones RGB cables, and vice versa to test if its not just the cable thats packed up, and only sending certain colours through, etc.
Though, I think your monitors starting to pack it in
I hope this helps