Question about Toshiba 42HP83 42 in. HD-Ready Plasma Television

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Soon after turning on, lose picture, then sound - it's like it's turning itself off

Hi, docjoh:
the subject pretty much says it all... about 5 minutes after first turning it on, the picture goes, then maybe a minute or two later the audio goes. the tv clicks like it's been shut off but the red 'on' light blinks. trying to turn it back on will give you the audio back for about another minute, but with the same end result

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Thanks for the offer, but I've already had the main circuit board (?) replaced. To anyone else who might be experiencing this problem: Several people suggested just cleaning the fans. I did, and it helped for a while, but it wasn't a long-term solution for me.

Posted on Oct 29, 2008

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I have the same set with a bad screen if you need some parts let me know i'll give you a good price
email me at
caypianan@yahoo.com

Posted on Oct 28, 2008

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Posted on Jan 02, 2017

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
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The most likely the TV has a power supply related problem.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

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