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I have a sony trinitron wega KV32FQ86U a 32 inch t.v. I have been experiencing persistent intermittent problem. the t.v switches itself off and on again. The drive IC has been replaced twice and this faults continues. the t.v is 4 years old. Is this t.v overheating or do you think there is another problem. I have cover with domestic and general but this fault happens maybe twice each week! what do you think?

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When the set switches off and on, do you mean just the picture or does the entire set go off? If the whole set, the standby light should blink a code number, pause and blink the code again for ever. Can you post the count here please? Which IC was replaced? Provide the answers and I can give you some options.
Dan

Posted on Jun 12, 2008

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teh 2 blinks indicate an overcurent condition. The most common cause of this is a shorted horizontal output transistor. Look for a 3-legged part attached to a heat sink close by the flyback transformer (part with red wire coming out of the top). Replace that part. That may resolve the problem. That part will be marked C5438 or something similar. If the marking is as I stated than the actual part number is 2SC5438.

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