The set was working just fine. i turned it off one night and i have never been able to turn it back on. the set is about 2 years old, but was only used for about 2 hours at night for about 6 months.
I just finished repairing the same model TV for a friend who had the same problem. My trouble shooting led me to cold solder connections on the flyback transformer. After repairing the connections the TV works just fine.
WARNING: IF YOU ARE NOT EXPERIENCED WORKING ON A TV, TAKE IT TO SOMEONE WHO IS. THERE ARE DANGEROUS HIGH VOLTAGES WHEN THE SET IS OPENED UP.
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id replace the tv its 15 years old and past the livlihood they usually have. it would cost more in parts to repair it than to go out and buy a new one. im sure you probably already know that though. have the tuner checked but i dont think it will save the tv but if it comes on when the cable box isnt hooked up then the problem could be in the tuner. its hard to tell. the tuner is about 100.00
I have a sansui 19" LCD TV+DVD I had to attempt multiple times turning the TV on to get a picture. The sound was fine. This kept happening when I would go to turn on the set the TV kept playing fine with picture & sound but after the 2nd attemts I turned it off & then tried to turn it back on which took multiple attempts, it kept playing for a few minutes then the picture went out but the sound was still there. The set is not yet 2 years old.
It sounds like your focus/screen block, the flyback transformer, or maybe a CRT anode lead is leaking high voltage. This could be a serious problem, or could be a simple one. You should not attempt this repair unless you know all of the high voltage safety issues involved with this TV set. Good Luck