Thank you for helping me fix my problem. I have further noticed that when the tv is put on, the picture intimitently goes off and then does not come on. I can hear the tv coming on but there is nither sound nor picture. The red LEd indicating the tv is on comes on intimitently and goes off, to me indicating the tv is trying to switch on but can not. Now when the tv does come on, it stays on for a little while and then switches off.
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You have a $ decision---this model uses two STK-392-120 convergence IC's--if it will not adjust one is bad.
Both need to be replaced--you can buy a pair on Ebay for less than 14 dollars plus shipping. Sometimes there will be a bad resistor near on of the chips that also needs to be replaced--this is a very common problem in rear projection TV sets--I have repaired hundreds of sets with this problem.
If you cannot do the repair yourself shop around your area--most shops charge about 300 for a repair like this on your set-I do lots of them here for 200 total.
If the $ cost does not make sense--it is time to buy a new TV--but remember this kind of set has a lot less problems than LCD or Plasma TV sets.....
If you have any questions or need more information let me know--I am here to help people.
STK392-120 is convergence correction amplifier.. the problem is the
convergence circuit... try to check the small Valuie electrolytic
capacitors or High value resistors! maybe the said parts is in change
Value... used a ohmmeter tester to find the chenge value parts!.
try unplugging the circuit board thats connected to the green picture tube thats the board in the middle then while the boards unplugged try to power up the tv if it works it means your green picture tube is shorted