KP-53s65 multipule problems, hoping for single solution?

Dear Professionals, Several symptoms and hoping that they have a common cure? 1) When TV is turned on, I have a fuzzy picture, as I change channel, the screen turns blue with diagonal lite blue lines and very faint images of recieved channel in background. Turning the TV off and back on clears the blue screen and returns the picture, but only until I attempt to change channel. 2) The viewable TV picture looks blurry with minor light fluctuations and a blue hue outlined around all dark colors. 3) As I attempted to align colors, the red aligned fine, however, the blue is so blurry that I cannot exactly tell where it needs to be set. A things I noticed: as I covered the all but the red crt, no light fluctuation and picture seemed fairly ledgable. as I covered all but the blue crt, the picture was very blurry (non-ledgable), but no light fluctuation was observed. as I covered all but the green crt, I had light flucuations on the channel I was watching. It there are any test or if there is more information I can provide please let me know. As this TV is 10 years old, I do not want to dump too much money into it and any help you can provide would be greatly appreciated. Although I am a novice to TV repair, my electronics knowledge is above average. Regards, monty