After 5 hours playing beautifully there was a crackle sound, the volume screaming all the way up. I tried turning the volume down with the remote but still screaming. After a minute or 2 the sound went completely out. After another 2 or 3 minutes, the screen went black. I let it set overnight and this morning when I turned it on, there was a blue area in the middle and thin blue and green lines orbiting about 1/2 way up. Please help. I just gave a local repair man 425.00. He said there was fluid that damaged power control. he changed that. Still having a problem Mitsubishi said maybe the signal module was bad. There was only 1 in stock and no more to be manufactured. It was damaged in shipment. He put mine back in and it was working a whole week in his shop.
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First unplug it. Sounds like you need to spray some tuner cleaner in the pots that are crackling. Pull the knob off and you should be able to use a spray can of tuner cleaner with the straw that comes with them to spray into the potentiometer , then rotate the pot several times while it is still wet. After cleaning them all, wait 10 minutes and then try.
It sounds like you've done quite a bit of troubleshooting, which I applaud you for doing. Have you tried power cycling the TV? Simply turn off the TV, unplug it (and any components connected to it), then plug it back in and turn it on after a minute. See if this corrects the issue. If it doesn't, then I would recommend calling our Product Support team to schedule repairs at: U.S., Canada, & Puerto Rico - 1-800-305-2204 Mexico - 1-888-882-7326 daily from 7 am - 12 am CT.
Id say you should go see a doctor. But for now id say that you should do your best to not listen to it for a while as it can affect hearing. try to use full on speakers if you can. On you tube there are a few Sub-Woofer sound tests you can do. Try playing one (low volume) and repeat. (not a song one)
http://www.teenbuzz.org/ also to hear which frequencies are out of range to you click here. ( click the second icon on the list further down the page)
The most likely cause of this is dirt/dust in the volume potentiometer. When the set gets warm it starts to crackle. You can try bllowing or sucking the dist out of the set. But the better option is to have the sound module replaced
Crakling sound is a symptom of loose or cold solder in amplifier section where the STK IC or Darlington transistor is located .You better re solder all parts joints there in order the crackling sound is gone.
Yeah i had that same problem. You know the chord? The cord you plug in from outlet. The square cord you plug into your speakers.. yeah the "DC outlet" is supposed to be UP. if you have it the wrong way in there it wont work and will make a crackling sound.