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The touch focus button was pressed,now I have no picture sound....nothing.Only the power button seems to light up.

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  • geoff_30 May 14, 2010

    IT IS A TOSHIBA 42H83 MODEL # 42H83 SERIAL # 16037562 3104

  • geoff_30 May 14, 2010

    No.Actually my seven year old pushed it to change channel.he couldn't find remote.I have unplugged the unit.Tried to surf channels,get to menu,etc...Still nothing.

  • geoff_30 May 14, 2010

    That would be great.Thank you.

  • geoff_30 May 14, 2010

    It'a 5:30.Haven't heard anything back.Is there any hope?

  • geoff_30 May 15, 2010

    That would be great.Do you think this would be something I could pick up local,say like bestbuy etc?

  • geoff_30 May 15, 2010

    I checked out the parts site,I'm a little confused tho.It's talking about distorted picture and color.I don't have any of that.It' like a setting has been changed.I can hear the speakers humming,but no picture.I hooked up dvd player just for whatever to see if I could get anything that way and still nothing.I just find it odd that one push of a button and the tv is gone.



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Hi geoff
I`m going to help you with your tv but first;
Could you give me the brand name and model number?

Posted on May 14, 2010

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  • Jacques Marin
    Jacques Marin May 14, 2010

    O.k toshiba

    Was the reason you used the touch focus because the colors where misaligned ?

  • Jacques Marin
    Jacques Marin May 14, 2010

    The most standard problem with your model is the convergence circuit.

    That is what aligns the colors blue /green/red so they make one.

    The first thing the touch focus will do is activate that circuit to verify and correct any mis-alignment.

    So in case of a weakened convergence circuit: it may precipitate any fault that would have occurred anyway.

    That would be my first diagnostic.

    If you`ll give me a few hours, i`ll see if i can pull out a service manual and give you more detail info.

  • Jacques Marin
    Jacques Marin May 14, 2010

    O.k i should be back at about 4:00 pm EST

    Talk to you then

  • Jacques Marin
    Jacques Marin May 14, 2010

    Hi again geoff

    Was stuck in friday aft. traffic and ol lady wanted to shop.

    About your tv now;

    I couldn`t find the exact service manual for your set but it does`nt matter because i still think the convergence modules are the culprit.

    If you are interested and feel like doing this yourself i could give a couple of addresses that would supply everything you need along with instruction on how to do it.

    Parts and tools to do it would cost around 80$

  • Jacques Marin
    Jacques Marin May 15, 2010

    Good morning geoff

    These parts sell at specialized electronics parts stores,

    In any case the address i`m gonna leave you has kits with instructions on how it is done for your particular model.

    Also i will leave you a second address where you will find an inexpensive set of tools to remove and re-install those modules(recommended) if you don`t have those already.

    So here is the parts address;

    And the tools;

    Keep in mind that there is a 80% chance of success that it will repair your set.

    On the other hand it would cost about the same to have somebody give you an estimate for the repair.

    Hope this help Good luck

  • Jacques Marin
    Jacques Marin May 15, 2010

    What happens is that the most frequent signs of a convergence problem is what you saw on that site.

    Another result is the shutdown of the set(which they can`t show on that site) specially in toshiba and samsung sets.

    The touch focus could just as well be called auto convergence.

    Thats what brought me to that conclusion.

    But now you`re talking about a hum in the audio which makes me think that you may have some fuses or picofuses(mini soldered fuses) gone as well.

    I don`t know in your case but in many cases theses kits will also supply these picofuses.

    So what would need to be done now is to test and replace those fuses if blown.

    But you can be sure that these fuses blew for a reason and replacing them may just bring you the picture that you saw on that website.

    Welcome to the wonderful world of tv repair, where problems can often cause a chain reaction.



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