Question about Toshiba TW40X81 40" Rear Projection Television

1 Answer

Thumping sound (like a heartbeat) through speaker (no picutre comes on)-Toshiba TW40X81

I bought this TV brand new in 2000. It worked with no problem for eight years until a few weeks ago. Now when you press the Power Switch (button) to turn on the set, all you hear is a thumping sound (like a heart beat) through the speaker, and no picture comes on. At first, I thought it was the circuit board connected to the power switch that was broken. So I ordered a new circuit board. I connected it, and it did not solve the problem. The thumping noise still occurs, and still no picture. Please help! What could the problem be?

Paul

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  • Phil Karras
    Phil Karras May 02, 2017

    Hi Julien134, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

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  • Contributor
  • 39 Answers

This may be a "ISL9860" chip on your T-con board - I saw a nice youtube video by norcal715 you can do a web search for "norcal715 samsung" & a few from him will pop up. The one I watched was at https://www.youtube.com/watch?v=l2jzLn5QEos
You might contact him through his youtube video.
good-luck.

Posted on May 02, 2017

  • Phil Karras
    Phil Karras May 02, 2017

    Oops, he was fixing a Samsung LED TV in a quick search I could not find anything he did with a Toshiba TV.

  • Phil Karras
    Phil Karras May 02, 2017

    This may be a "ISL9860" chip on your T-con board - I saw a nice youtube video by norcal715 you can do a web search for "norcal715 samsung" & a few from him will pop up. The one I watched was at https://www.youtube.com/watch?v=l2jzLn5Q...

    You might contact him through his youtube video.

    good-luck.



    Oops, he was fixing a Samsung LED TV in a quick search I could not find anything he did with a Toshiba TV.



    I also found a repair kit but not for your problem:http://www.tvrepairkits.com/xcart/tw40x8... but perhaps they know of your problem and have a fix.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 128 Answers

SOURCE: Toshiba tz50v51 popping sound

Possible problems: * The TV set may be unplugged. * A fuse or circuit breaker may be blown or switched off. * The remote control unit (RCU) may be disabled. Solutions: * Make sure the TV/VCR are plugged in and the wall switch is on. * Check the fuse or circuit breaker. Test the outlet with a lamp. * Replace the RCU's batteries: if this fails exchange the unit.

Posted on Jan 19, 2006

ChanceOne
  • 1 Answer

SOURCE: No sound or picture

Keith, Check fuses Then Resoder The COMPLETE board I bet there is heat related problem W/Old Soder Just a Hunch!!!!!!!! G'Luck Chance One 559 @ Yahoo . Com

Posted on Feb 25, 2007

Arpi
  • 326 Answers

SOURCE: Flashing power button

Hello, please check the vertical output IC and convergence IC's (STK392-110). Best regards, Arpi

Posted on Apr 27, 2007

ctf1800
  • 4402 Answers

SOURCE: TOSHIBA 40H80 projection TV - no sound / no picture

it could be, that would be the first thing i would do to rule out I would first check for loose connections on the board.

Posted on Dec 06, 2007

Slinteriors
  • 8617 Answers

SOURCE: tz61v61 toshiba 61 rptv theaterview

If the relay clicks you most likely have a leaky diode or bad transistor in the stand by or start up circuit. There is a manual available for that model called. Toshiba Power Supply and Shutdown circuit Troubleshooter. Its available at the following link. It gives step by step instructions so you can figure out exactly whats wrong with your set. The site emails it too you after you place your order and they also provide free unlimited tech support so you will have a resource for help if you need it. I am one of their on line support techs. I highly reccomend that Manual to any one with a toshiba that will not power up. Here is the link.
http://servicemanuals.vstore.ca/

Posted on Apr 12, 2008

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