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Replace Fuses 302 5amp and 303 5 amp Resolder all poor connection on power supply board and Replace Both STK ICs they are big black ics STK392-180s is best ICs Call Mats 1-800-628-1118 This should have you back to watching TV again.
you dont need a service manual. the problem is the convergence chips and it has been plaguing these pioneers for years it is either the bad solder joints on the chip itself or the chip is trash anyway go to tvrepairkits.com and they will help you get everything u need
Hey dudes...even i hav had the same problem that too with the same model specified here..Its a problem actually concerned with the power circuit boards of the tv. Its best to get it checked by an authorized technician. For me I had to replace a transistor on one of the boards. But after that my tv came up with a new problem....the colours appear like rainbows! Could nyone xplain y dis is happening?
You might want to check the power supply/deflection board for bad solder connections. i found on the one i was working on. the standby and main power relays was broken loose from the board also check for any other solder joints that look cold jointed. i have been a tv technician for 13 years.
I hope that will fix your problems...
It sounds like an eeprom issue. But you can try to reset the set. Turn the set off by the main power on the set. wait a minute or two then together push both the main power button and the standby power button. This should resett the tv. If that doesnt work you will need service as the zoom and the various modes are all controled by the eeprom. Only hold the two buttons for a second. sometimes you will hear the crts discharge while resetting.Hope this helps