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July 23, 2012 10:53 AM

Categories: Televisions and Projectors

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Joined: 12/14/2009

SONY Trinitron Model KV-XF21M65 LED blinks twice and TV has no sound and picture. I know the fault is due to a high currant leakage in one of the power supply circuits, causing the overload protection circuit to shut-down the TV.

The Horizontal o/p transistor C4927 is OK and no other components is faulty in that area. I did a thorough clean and resolder job.

But without a schematic diagram, the fault finding will be an uphill task looking for a pin in a haystack.

This TV belongs to an Old Folks home and I want to bring in some cheer to their faces by repairing it free.

Agoraquest has it but my country Malaysia does not allow purchase through paypal. Can someone out there either help me to solve this problem or obtain a schematic diagram free of charge and send it through email. ( mahathevkrishna@yahoo.com)

I will report repair follow up for everyone's benefit.

Your help is greatly appreciated.

Warm regards



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