Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV

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SONY Trinitron (POWER on. Black screen.)

Theres a light in power led indicator.No display on screen.
Does it have something to do with the flyback or just a component in the power supply board?

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This is not the flyback, if the model is the one listed in title, it has no flyback, has it is a rear projection. The motherboard is possible, but also C board and D board are likely.

If there is a flashing led on front of the TV, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1 The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the TV will reset just unplugging power cord for one or two hours, sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occurr suddenly are a blown capacitor on power board, a convergence IC has blown, or a faulty on Digital board.
check also the video cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

Check also connectors, try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact SonySony Global - "Contact Us".

If you want to repair at your own expenses, just locate any good qualified repairer.


Regards

Posted on Mar 07, 2009

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