Question about JVC AV-36950 TV

3 Answers

Tv won't turn on red light comes on goes right back off with clic

Turned the tv off went to work came home tv won't turn back on red light comes on goes right back off and makes the clicking noise it usually makes when it comes on I checked the little fuse inside and it looks ok.

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  • Archie Ferguson Dec 29, 2008

    turned the tv off went to work came home tv won't turn back on red light comes on goes right back off and makes the clicking noise it usually makes when it comes on I checked the little fuse inside and it looks ok. I tried unplugging it over night still does the same thing.

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3 Answers

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  • Master
  • 2,110 Answers

If you had removed the back off the set with it unplugged and asked
what is the black thing with the big red wire going to the top of the
tube because it has a big hole in it, then we could have guessed what
part had failed but still no way to know how far the damage went into
the electronics. You would need to have someone troubleshoot the set
who knows how to repair electronics.

Posted on Dec 29, 2008

  • Sibananda Jena
    Sibananda Jena Dec 29, 2008



    I dont know how much technical expirence
    you have, but be very careful there are many circuits that have high
    voltage on them, even when off, and these voltages can be lethal,
    especially any thing that is connected directly to the A.C. line [such
    as the primary of the power supply]. most of the rest of the set is
    isolated from the A.C. line. so be careful. now for the tecnical part,
    most common is a failure of the vertical circuit, the shorted IC will
    cause the set not to come on in order to protect the power supply.
    after you replace the IC and any resistors and diodes that may have
    failed as a result of the bad IC, change any caps related to the
    vertical circuit, they will be 100, 220, or 47 mfd @ 35 volts or so.
    lastly check the zener diode that is connected across the output of the
    IC for leakage or shorts. It is also possible for a filter cap. in one
    of the low voltage supplies to be open [it may be noticed as it will be
    pregnant.]to cause a no operation condition. so good luck and think
    safety.

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  • Master
  • 916 Answers

Do a full reset it can take 2 to 4 hours all you need to do is unplug your tv for that amount of time. It has entered protection mode. Doing this will reset it.

Posted on Dec 21, 2008

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  • JVC Master
  • 19,396 Answers

If the red light comes on goes right back off and makes the clicking noisethat means that the TV entered in protection mode.

Protection is a special diagnostic mode, that starts when a fault is detected, the clicking noise is a safety switck that keep turning off TV to prevent further damage.

Try unplugging power cord for one or two hours, if this does not work, then the TV must be tested anby a technician and fixed.

Posted on Dec 21, 2008

  • Ginko
    Ginko Dec 21, 2008

    Common reasons for protections are : alignment fault, blown component, short, cold solder joint, PSU problem (power caps blown), Convergence problem (STK IC blown).

    For all this problems you need an experienced technician, try first unplugging the TV for a while, as you have had this problem for a while and things are getting worse.

    It may be time to replace your TV.


  • Ginko
    Ginko Dec 29, 2008

    If the TV stays on protection after leaving it unplugged for a long time, that means that there is an internal fault.

    The technician will start inspecting and testing the psu board, looking for shorts, faulty capacitors and other possible faults, and then will proceed in testing deflection circuits, convergence and other common faults.

    If the TV model is the CRT descripted on title, it may be better to buy a new TV, rather than spending $100 or more to repair it.


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