Your on the cutting edge of home pc entertainment, and you have an 18 year old telly????
You need help 
Same thing happened to my brothers TV. It was a Sony Trinitron, which was just inside its 5year warranty.
So we called them out, and this TV repair dood came round and plugged this 'magic wand thingy' into a wall socket, and waved it wildy around the TV.
He looked so funny, I nearly shouted out 'Feel the Force Luke' 
Anyway the screen went absolutely mental while he did this, but lo and behold it fixed it!
I think he said that is just needed de-magnetising or something. Even though I thought that it did that on every startup cos of the Buzz noise that can be heard.
Have a word with your local TV repair shop.
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