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Sony KV2179MT TV has no sound until 20-30 minute warmup. Is there any electrolytic dry or short in the power supply or do I need to change the audio IC?

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Sony KV2179MT TV has no sound until 20-30 minute warmup. Is there any electrolytic dry or short in the power supply or do I need to change the audio IC?

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Test the audio/video input by inputting any DVD player or VCR. If sound is okay, the trouble will be on the IF block section.

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