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Toshiba TV Model CX36H60 Turns on by Itself

Discussion in 'Electronic Repair' started by [email protected], Oct 31, 2007.

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  1. Guest

    I have a 36" Toshiba, Model CX36H60 (TAC9813) that will turn on by
    itself, intermittently. It has done this 3 times in the last 6 or 7
    days. When this happens, the remote control will not control any
    function of the TV. Pushing the power button on the TV will turn it
    off. Then the TV will once again function normally and remote control
    will work the TV as it should. The last time it came on by itself, I
    pushed the channel button on the TV and the TV turned off and then
    back on by itself within a couple of seconds.
    I am thinking that it could possibly be a cap in the power supply, or
    a loose connection. Has any one ever run into a Toshiba exhibiting
    this type of behavior that can steer me in the right direction?
     
  2. D-unit

    D-unit Guest

    I just had a magnavox 20" do that. You could hit the side of the
    set and make it come on. Hit it again and it would go off.

    Pushing the "ON" button did nothing.

    It turned out to be a cold soilder joint in the power supply.

    db
     
  3. Ken G.

    Ken G. Guest

    Did someone spray cleaner on the screen and let it run down ? it can
    drip on the circuit board right on the buttons inside .
     
  4. clifto

    clifto Guest

    1. Make sure the mechanical power button is all the way out, i.e. not
    halfway pushed in.
    2. Cover the remote sensor window with black tape for a while and see if
    it still comes on when not requested.
     
  5. AJ

    AJ Guest

    Pull chassis all the way out of the tele, disconecting the plugs and hv lead
    appropiately.
    Check across the front of the chassis, the area that is normally under the
    front of the crt. Check for any contamination or fuzz that may be on the
    board as a result of material dripping down off the front of the crt due to
    improper cleaning or spillage. Check all of the tac switches for proper
    action or just change them, check for zener diodes connected along the buss
    lines from the switches to the mpu, any of them going leaky may draw the
    line down causing erratic functions. Also, as posted, erratic PS voltages
    doe to component changes will also confuse these sets.
     
  6. Guest

    Thanks to all for giving advice on what to look for. I will try to
    check it out this weekend and will post my findings.
    JR
     
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