Toshiba 50H72 50" Rear Projection Television Logo

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Posted on Oct 11, 2007
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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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  • Master 4,402 Answers
  • Posted on Dec 14, 2007
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Joined: Dec 02, 2007
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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

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STK394-160 = Hitachi part # CZ 01341

.........................T.
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