Sounds like it. Same thing started happening to my 3rd crt about 9 months ago and it still works, but led me to ordering a 2001 fp =)
Started off with a red tint, then the brightness increased to about 3x normal, then 15 horizontal lines appeared, and finally the monitor needs to run about 30 mins to "warm up" or it'll turn itself off if you open any sort of window. hehe