My first gut tells me that this is a power supply problem. The power supply runs out of capacity due to the increased load of the audio amp.
Possible problems might be power supply capacitors have changed their value (lowered), if it has a linear power supply, the full wave bridge (that converts AC to DC)might have a bad diode, if it is a switching power supply one or more of the output capacitors may actually be open.
Another possible problem is a cold solder joint. Does the picture breakup occur when the case is slapped? This could indicate a mechanical failure (like a solder joint).
Is this the only symptom that this set has?
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This problems is the causes by the board call the T-Con decoders board is dying.This board sit right in the middle bottom of the LCD picture screen panel.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-Con decoders board for the replacement.
WOW never heard this one . You might check the volume down button on the tv to see if it is depressed in . What is the model # and do you clean the picture tube with windex ? Maybe some of it has seeped down onto the control board and has gummed up the volume down button. Good luck
I have this camera and unfortunately there doesn't seem to be a way to turn that sound off. It's odd because I have an IS-DV2+ also and if I turn the volume all the way down, that sound is muted as welll. I don't know what goes on at Aiptek...
Depending on age, it sounds as if picture tube has an intermintent short in the red gun. tap on the center of the screen to see if it goes away, if it does,I would strongly say that the tube is gone; but you could try openning it and check if the crt board is mounted on the tube's neck properly. do this at your own risk since you might get a shock if not familiar on how to handle tv's.
Sounds like some kind of local interference. The first thing I'd try is disconnect the antenna input. If the wavy line goes away, it's probably something coming in through the antenna. Then I would start shutting off the circuit breakers until I was down to just the one the set is plugged into. If it goes away I would start flipping the breakers on, one by one until the noise returned. If you can isolate it to one circuit, start looking at everything that is on that circuit. If all else fails, call a TV tech.