Question about Toshiba 55H70 55" Rear Projection Television

2 Answers

Lite in the front of the TV when you turn on keeps blinking and no picture.

I unplugged the TV power supply cord and reconnected it after a little while the light still kept blinking couldn't get it to come on. After setting up a small TV which works fine with the satellite connection, the next morning turned the big Toshiba back on to see if it would come on and play, it did for couple of daysday then went black again with the blinking light have done that twice now by leaving it sit overnight and again it worked fine. it is working now againthis but don't know for how long before blinks again.

No picture power light blinks

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  • hal S Jan 06, 2008

    The above is not my exact problem..my set simply has no picture and does have sound but the power light blinks I have not unplugged it because I need help moving the set..should I unplug it and if that doesn't work what do I do next?

  • hal S Jan 06, 2008

    I got the set unplugged and powered up the light is not blinking and still have no picture but there is a ticking sound coming from inside the TV when the power is on

  • hal S Jan 06, 2008

    Well any ideas on what next? who do I call do repair people exists that will trouble shoot and fix on site??

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I am assuming the problem may be heat related, since the set works after cooling and being unplugged for a period of time. If this is something you are going to work on, I will suggest a pattern that we use at our shop to troubleshoot these type of problems.
Tools Needed:
, Can of freeze spray ( component cooler ) can be purchased at Radio Shack of any electronic supply store. Hair Dryer, Phillips Screw Driver or screw gun, soldering iron, solder.
Troubleshooting instruction:
1) Unplug the set from the wall/power
2) remove the back of the set ( bottom panel cover)
3) plug the set back in the wall and power up the ( turn it on )
4) with a hair dryer ( and not touching part of the inside of the set) turn the hair dryer on and blow hot air inside the set for at least 20 minutes or until the set quits
5)If set shuts down ( quits), then use the freeze spray to cool the boards by spraying. Do one board at a time to isolate the board. After cooling one board, try turning the set back on, if the TV starts, you have isolated the problem board. If not spray a second board and repeat the prosses for all board until the set starts so you can isolate the board.
6) Once you have isolated the proper problem board, you'll need to isolte the bad part ( ic, transistor, capacitor, etc). Again using the hair dryer, heat the board until the set shuts off. Then using your freeze spray, spay a small part of the board and see if the set starts working properly by switching the set on. With some time, you'll isole the problem part and the it's time to remove the bad part and simply change it. Remember to always unplug the set from the wall before touching anything inside or changing parts.

Additional Suggestions and PreCautions:

Your problem is most likely a filter Capacitor, moreso than a IC or Transistor.
Rember to use extreame caution when working inside the tv and please know that Freeze Spray freezes everything it comes in contact with including fingers, eyeballs and any skin part.

Good Luck
Ed
NC Electronic
Mills, Wyoming

Posted on Jan 06, 2008

  • Ed Meshechek
    Ed Meshechek Jan 06, 2008

    The ticking sound indicates the power supply is not receiving proper voltage to turn the circuits on. Again, it sounds like a main filter capacitor in the power supply. Keep me posted

    Ed

    NC Electronic

    Mills, Wyoming

  • Ed Meshechek
    Ed Meshechek Jan 06, 2008

    If this is not something you can fix on your own, you will need to call a repair shop in your area. As for on sight ( home service ), there are still shops that offer them, but that is getting farther and fewer between due to cost and just the fact that most problems can't be fixed in home anymore ( no one can carry all the boards needed to fix everything ). Being a Toshiba, you should look in your owners manuel and find the 800 number to contact Toshiba Customer Support and ask for a local Toshiba Repair Center in your area.

    You can also obtain assistance on the web by accessing Toshibas web sight.www.Toshiba.com





    Ed

    NC Electronic

    Mills, Wyoming

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The blinking is giving you an error. Even thou you say your TV is working fine, there is something wrong. It could be anything from the convergence(like Color problems slightly out of line) or Sound problems, or you may have problems just in the power supply. Could you remember the set acting funny like in the past? If so do you remember what went wrong or what gliched? This could tell you what is going on now. If none of this it could be a capacitor in the Power supply.

Posted on Jan 06, 2008

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Just follow this instruction to fix your TV..

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