Question about Toshiba TN50X81 50" Rear Projection Television

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No Picture The red power light is flashing and I can't turn unit on

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Hi
A power regulator or a sweep power supply problem. The power regulators in the main power supply, and will have or start with STR###-## The # are numbers or letters. This is a repair that should be done by an amature or layman. This is a solid state set, and there are no user replaceable parts inside these sets. Have it looked at by a trained tech.
From your description, I suspect you have a power supply problem. It sounds like set is turning off because the power supply is not regulating properly. I would suspect you have a few Capacitors in the regulator circuit failing.
If you were to take this set into a shop for repair, I would expect the cost to be around $150.00 to fix it.
If you are going to look at it yourself. I would look for bad caps in the regulator section
If you are going to work on this yourself, I would recommend finding someone with television repair experience and the proper test equipment to help you. Television picture tubes contain, High voltage. You can be shocked even it the set is unplugged If the tube is not properly discharged.


hope u will b helpfull
regards

Posted on Jun 21, 2009

  • Anjana Batabyal
    Anjana Batabyal Jun 21, 2009

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

    1The 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 abroken contact, identified an internal fault and kicked in , startingthe flashing light.


    If you are in situation one, then theTV 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 occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

    Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.



    regards

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