I was watching my sony 36 wega and it just went off. it wouldn't come back on so i unpluged it for a day and it came back on,good for 2 days..the it would come on sometimes...took it to a repair shop and they replaced transformer and the set worked fine for two weeks and now i am having the same problem and the shop they can not find anything wrong with the set..got it back and some days starts up and some days it would.. please help me or information so the shop can fix it ... thank you..randy
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Remove the back cover and look for discolored components(most likely coil or transfo),also unplug teh set after it has warmed up and touch components lightly to feel for overheating.i had burned coil in a similar set,around the pincushion circuit.
This could be a scan amplifier failure, and there is a loss of high voltage to the CRT. Part of the power supply may have also failed. In these sets, if the CRT emission goes low in emission, or the CRT goes defective, the bias supply to the CRT will go in to protect.
An experienced TV service tech can troubleshoot the set and give you an estimate for service. Considering the age of the set, the cost of service may not be worth it.
My 36 wega did the same thing last week it must be contagious. Blinks 7 times mostly but sometimes 6 if hit power switch again. The problem is the D-boards shorted Flyback high voltage transformer but the ones Sony is selling $130 do not hold up and seem to burn out in a few days, yes twice bitten. Finally they send me new D-board can't wait to see if this fixes it once and for all. The board costs around $200 but is worth it to get it running again.
There may have been some problem in the horiontal transistor. Also, Check for the zener diode that controls the supply going to the flyback. It might got busted due to the sudden supply surge.
Here's my suggestion , unhook all the external components to the TV
and leave the TV unplugged for more than a few minutes (a
day/overnight). The next day plug the TV into the wall outlet (not the
powerstrip) without anything hooked up to it, and turn it on. See if it
comes on. Sometimes unplugging for a few minutes/hours is not long
enough for it to reset itself.