I have an older model GE television. It was working fine until this morning. We had been watching for a couple of hours, when the volume all of a sudden started going down by itself. We have tried to turn it back up, but it continues to turn itself down as soon as you let go of the volume up button. Anyone have any advice?!?!?
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The first thing to check is the push button assembly maybe the volume down button has been pushed in too hard/far and is always making contact,sometimes when we clean the face of the tube water drips down in thru the edge of the frame in the buttonts,corrosion sets in and creates a short,if you are familiar with tv service you can chech the buttons thru the inside to make sure they are not pushed in but if you are not famliar be safe and call for assistance froma servicer.
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If it is an LCD model rather than an LED model like the newer TVs, it is probably the back light fluorescent tube or its inverter board. These have been the nemesis of Flat Panel TVs/Monitors since their inception. Many older computer monitors that are used heavily fail in just over 3 years. This is why most of them were only warranted that long. Repair of the board/tune is possible, but results may not be optimal. With the current price of LCD TVs today, you are better off buying a new one.
Check the speaker/s first. If found OK; check and replace the damaged component/s at its audio output section circuit. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
this problem is connected with your horizontal control. if you can bring it to your tv repairman and see if the horizontal board can be repaired or replaced this is what i have found on many older models due to heat build up in the case.
These unit will mute the video for a number of reasons. F889, F890, F891, F850, F470 one of these fuses is open then fine out what caused the fuse to open. This an older unit so parts may be hard to find. The cost to repair it should not be to bad.
Check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Pull up older posts.