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Westinghouse 42' tv working fine this morning, got home from work this evening turned tv on picture come on for about 4 seconds than blank screen still had sound pressed menu botton still blank screen turned off 30 seconds picture come on for 4 seconds again still had sound repeated this several time no change

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Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
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.

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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