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I just fixed the problem very easy... The RCA have a front cabinet which is very easy to remove. I took it out and the only thing that is expose is the speakers and the sensor control. Is a little panel about 5" just spray it with dust spray and that what I did Is not changing channels by itself anymore. I save $3,000 I was about to trash it. Im happy I did that...
the buttons switches are leaking more than likely this a comon problem in a lot of tvs they start leaking and send a voltage signal to the ics and tv will start doing funny things. Anyway need to replace these switches probley about six of them in all they are mounted on a board behind where you push the power button. Should replace all just to be on the safe side.
Ether the front panel channel button is sticking or the remote channel button. take the remote out of the room.. if it still is changing channels make sure the channel buttons on the front of the set are not sticking. Spay a little WD 40 on them then wipe them off
this is the same type of problem happening with other rca models and I know it is the EPROM CHIP but why this is failing is either because of design flaw , dirty enviroment that they were made in , to much voltage or current to the chip or too much of a draw from the chip causing it to fail . Or even a random frequency from the IR sensor or its circut I'm still investigating and testing.
leave the tv unplugged for at least 3 weeks durring this time resolder any solder that don't look good , I did this and it lasted for about 6 months(always plugged in to the wall) before it started doing it again. model # 27v412t
I think your remote may be at fault. Liquid spill or sweat from the hand accumelates on the inside over some time and then becomes sticky. Some of the buttons may be permanently activated. Then other functions won't work. Have someone check it for you or if familiar yourself. Regards, JUS004
It sounds like a stuck button or switch. What happens when you hit the channel DOWN, does it still keep scrolling down?
Is this with or without the remote?
Have you tried it with the remote and or the TV?
Let me know whether you are changing the channels with the remote or the buttons on the tv and I can try to give you a couple more suggestions. Mac =)
The most likely problem is a stuck tact switch, if it goes up in channel number, 5, 6, 7, etc. then the channel up button is stuck, if it counts down it`s obviously the ch. down button. Problem is you have to remove the guts of the set to get at the control boards screws, you can try turning on the set and poke around the offending push button with a tooth-pick, if it stops changing channels leave it alone and use your remote from now on to change channels, if you can`t get it to stop the tact switches or the control board module will have to be swapped out, hope this helps
ok, Sony had this issue on their early production. The problem you are having is called a leaky switch. The volume down switch on the TV is leaky. To fix this you must replace the switch. This part is called the switch block. Part number 1-473-549-21