Question about Sony FD Trinitron WEGA KV-34HS420 34" TV

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Turns on for 2 or 3 seconds then turns off. it

Turns on for 2 or 3 seconds then turns off. it will turn on after a few days.

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  • 58 Answers

Check a defective capacitors on the power supply section..........or you can resolder all the parts cause maybe it is only a cold solder

Posted on Nov 19, 2009

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My TV has been having a shacky picture when it first turns on for a few minutes, then clears up. the other day after using the TV for most of the day, it shut off unexpectidly, and now it will turn on and...


1. YOUR flyback is going bad 2. Peform a removal and replacement 3. check your error codes first to ensue nothing else exists 4. Proceed to change out the required parts 5. Observe all electrical risks 6. Order replacements from jimmyparts.com 7. Ensure to always remove power 8. Ensure to always use electrostatic wrist strap

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Sometimes when the TV recives a brodcast signal for a new update to the mainframes firmware, it will have to turn itself on to install/recive the update and aslong as it is connected to a power source it can do this. hope this helped answer your question. Have a good day :)

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Does red light blink? if yes, please count blinks as there would be pause of 3 seconds between blinks and let me know to help you out.

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Mitsubishi WS-55807 turns on but then powers back down after a few seconds


Good Day;

The fuses tell you that circuit has failed and was drawing too much current. No other test is needed.

Good Luck, big Irish.

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My monitor turns itself off


If it's only a few months old then send it back under warranty.
The fault you have is the inverter circuit.

Hope that helps. =)

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