Question about Toshiba 50H72 50" Rear Projection Television

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Flashing picture when start up

Hi I have a Toshiba 50H72 50 Rear projection TV that is 4-5 years old. It has recently been flashing the picture when it is first turned on. After about 5-10 mins it works perfectly. Any ideas?  Thanks Steve

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Re: Flashing picture when start up

What i would do id purchase a can of freeze from radio shack
wait till the picture is good then freeze one ic at a time till the problem shows up, once it shows up let it warm back up and refreeze to make sure you got the correct part.
found this on anther site:
My first guess is an electrolytic cap in the main power supply and/or a voltage regulator that feeds the deflection amplifiers.

The cost of repair is not much; the greatest challenge is finding the bad cap because there are so many of them and scattered through out the sections.

If you have a scope and can look at some waveforms and voltages around the deflection and power supply feeds you may be able to zero in on it right away

Posted on Dec 14, 2007

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