There is a loud popping sound from the TV occasionally it will shut off the picture. When I power cycle the TV the picture returns. It's a very intermittin problem and only one out of 5 times will the picture actually turn off. The sound remains on. It seems to be occuring more frequently. I've opened up the back of the TV and cleaned all the dust out to see if that would help and it hasn't. Any suggestions on what could cause this?
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Most likly it is one of the crt connections to the Hi voltage block that is causeing this problem or the crt it self is archuing , or the Hi voltage transformer, or the Hi volyagre distribution block is going bad. your going to have to observe ther problem happen or know what to look for when troubleshooting this set. I would recomend that you do not attempt to troubleshoot this set as it is a high voltage problem and theres enough Hi voltage inside this puppy to make a grown man cry or kill him!
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Popping noises are not a good sign; I suspect the sound came from the catastrophic death of an electrolytic capacitor or worse, the death a a power semiconductor. Open the lower cabinet and using a good light, look for a smaller, separate board with fairly large parts on it; some cylindrical in shape, others block-like that may have copper wire showing. If, as common, this board is plugged with connectors into other parts of the system, you may be able to swap the failed board out for a replacement bought from a Mitsubishi service center.Expect to pay $100-$150 US if the set is no longer under warranty.
Your set has a problem with its power supply. If it is under warranty, have it replaced ASAP. If your warranty has expired, you can take the set to any good repair shop - ask for an estimate before having any work done to it.
The problem is that there is a bad capacitor inside the unit, it is either on the main panel or the power panel. The popping sound you got was due to the fact that the lead on the capacitor was bridging, therefore causing some electrical popping sound.
Run a check on the main panel and the power panel for any bad capacitor and replace it with a new one. That way, your television will be in good condition once again.
Power supply board is dead.The board where the power a/c cord plug into it.Replace the power supply board.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
It must be connected with the color circuit of your tv, a board connected to back end of the tube. Could be dust, cob web or carbon deposit shorting a transistor. Popping noise if loud enough can be attributed to high voltage circuit fault and picture tube.
Any other symptoms? You may be just hearing the occasional sound of static being bled off, or, if the set is not working properly, the sound of the high voltage section trying to compensate...accordianman