I have a sony triniton TV set which has operated for about four years without any problem but one day, as the tv was on, the screen went black showing nothing and some little smoke was seen coming from behind it. What could be the problem or advise me on which probable spares that could be blown. Thanks alot. Josexto.
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Re: Tv screen Faulty
It's always a bad sign when the magic blue smoke is released from inside the TV set. I would suspect a defective capicator has blown its' top. When the screen went black, did you lose audio also? If you still have audio, it's possible that resistor R587 Opened up which would smoke, (1.5k 1/4 W) And D518 Shorted (Nte558) If you lost audio as well, then it could be a shorted Vertical IC pack. If you're not up to testing and replacing components, the set will need to see a repair shop.
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Every set has a standby power supply that runs 7/24 when set is plugged in---it means in this case a main power board or something associated with that is not working, Set is not making it from just standby to full on.
HI, ur tv has problem with its vertical scanning side. vertical scanning output ic (integrated circuit ) may have some problem ( faulty or dry soldering in its leads). u can easily find out the vertical ic on ur tv. there will be four wire coming from the coil which is fitted on the picture tube neck, of which 2 will goto horizontal scanning section and the remaining two will go to vertical scanning section. just follow the two thin wire (normally in color green and yellow ). it will goto a socket on the main board. follow the track on the board. it will lead u to vertical scanning section. check for any dry soldering, if not , replace the ic. ok
The 7 blinks usually mean a high voltage shutdown has occurred. This can be a simple repair or more involved. If you are comfortable working inside the set where there are potentially dangerous high voltages, and can solder, you can try and repair this yourself. Let me know if you wish to attempt this and I'll supply additional details and instructions.
The four blinks indicate a vertical deflection problem. I would suspect either bad connections on the vertical IC or a defective IC. This IC is a small flat IC with about 9 pins or so and should be marked LA7837 or something similar. Try resoldering the pins first. If that does not resolve the problem, replace the IC.
You may also need to replace some capacitors in the circuit, but try the IC first and keep us updated.