I have a 2 year old Magnavox tv and 3 days ago the sound stopped working while I was watching it so I turned it of and then back on and now there is just a line, channel number, and the word mono on the screen. I went in and all my settings were at 0 so I changed them and then once I tried to go to a channel every thing erased. I think I need a new one but I thought I would double check and make sure that I am not forgetting something...Thanks, Cindy
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This problem is actually common. Your degaussing coil has malfunctioned, causing the power supply to become unstable which in trun is effecting the memory settings in the processor. You have threen problems in one so lets start by looking at the overall cause first
1) degaussing coil going bad (shorted then opened) Replace this and the thermistor that is attached to the degaussing circuitry.
2) power supply instability (power surge from the degaussing circuit) replace the damaged components in the power supply section. Troubleshoot this thoroughly.
3) after fixing the power supply and the degaussing components you will need to manually degauss the TV and then use the auto-degaussing function to do the rest.
I hope this helps,
Sounds to me like you need a new control panel board which should run you about $150-$200 max! might be semi burnt out like mine was and that is what i had to pay not sure if this helps but hey ya never know :)
The above fix, listed by Tom saved us!! We did as instructed and took off the back of our 50 inch Magnavox plasma tv. We were not sure what we were looking for so we googled capacitator (image) & there was a photo of a fried capacitator! Sure enough we noticed ours were "fried", we took out the board and went to an electronic supply store, bought the 2 capacitators ($2.00 each!!) and then found someone who did tv repair to sauter the new capacitators onto the board. (It is important someone who know how to sauter and recognizes polarity do do this for you) All in all we fixed this following the above instructions for $34.00 and our time. For a month we were told to spend hundreds getting a new power board!
Kudos to you Tom & thanks so much!!