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Toshiba 20wlt56 lcd tv, digital tuner has stopped working

In the middle of watching a digital broadcast, the picture froze. It would not respond to the Remote except for a couple of functions eg Volume, Source Select, Picture in Picture. If the source is changed to Analogue/AV etc it works fine but as soon as I change source back to Digital the screen displays a frozen image of the last thing displayed before changing source.
Toshiba Helpline suggested removing the power input for 5 seconds to reset the TV but that did not work - I even left it disconnected overnight without success! She said that there is a Factory Reset option hidden away in the menu, but it's in the Digital menu which I can't access!
Is there any other way to reset it, or is it likely to be a repair job? If a repair, anyone have an idea of the likely cost?
Thanks.

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  • Anonymous Jan 03, 2009

    I have the same trobule....

  • john992 Feb 19, 2009

    I have the same issue with my Proline TV. It was working ok then I started flicking through the channels and it lost signal. It stated "No signal input" so I checked all the cables and they were ok. Tried the analogue and DVD player both worked ok. Called Comet and was also advised to reset it via the menu (although this couldn't be accessed as it was frozen). Comet recommened taking it in and as it was 1 month out of warranty we would have to pay. At present they are looking at it (it having been sent away) and they are doing that for free as we complained but if they find it needs a new part they said we will have to pay. I hope we get a solution to thi issue as it seems common looking on the net but not worth the repair bill.

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2 Suggested Answers

diodeic
  • 1622 Answers

SOURCE: NEC - Model NLT-32HDB2. The DTV (digital receiver)

Hello,
You can fix this, all that is needed is to carefully understanding the electronics parts used and having little of basic knowledge in electronics.
The problem is in either power supply or the Y sustain board. The Y sustain board is are relatively large board if out of which go connections to the side of the display , it therefore closer to either the left or the right side of the display , has at least one rather large heat sink on it and far power cables connecting it to the mains power supply .
Often there are fuses on that board , one or more , check them
If they are blown you can try to replace them, but expect them to blow again , usually the whole board needs to be replaced.
Often that need to be done in a service center as there are some adjustment to be made after replacement.

Posted on Aug 22, 2010

SD Tech
  • 14553 Answers

SOURCE: no digital channels or menus

Yes, the main tuner is likely bad.

Posted on Jun 13, 2012

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