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Does this happen while watching a program or just when changing channels? Most cable companies are notorious for not balancing their sound levels form channel to channel. Same applies to off air programs too Make sure the connecting cables have a good connection and are of high quality. Anything else is in the tv itself.
Do you live with someone who likes practical jokes; even silly ones?
There are a number of companies that make remotes that can mess with someones TV or other remote devices. I have a watch, as a gag, that will self program its remote to operate any TV capable of this feature. With this watch, I can change channels, power status and even reset the TV to factory default state. Next time this happens, look behind you.
My TV 40RV525U changing channels, menus itself for few months ( I use antenna). my son tried to stop the channel scrolling by enter weird number into the channel to stop it scrolling such as 555, 777.. later, it turn on off by itself and unable to hold on a channel I
call Toshiba customer service and they ask money $25 for
troubleshooting but I denied since I do not want to waste money and
Now, I found how to fix it myself.
In my case, something was wrong with the signal comes from the button control on the left side of the TV. ======================== What I did ======================== unplug the power cord. Remove back cover. Look into the motherboard ( biggest green at the center).
I disconnect a connector on the motherboard come from the IR board that
receive the wireless signal control ( meaning the remote is disable). I turn on the TV, press on Menu button on the TV side. Menu is still scrolling.
I turn off TV, disconnect power cord and connect the IR connector back to the motherboard. I then disconnect the nearby connector that comes from the side control buttons.
Turn on the TV by remote, press menu button on the remote to check. The menu stays.
I use electric tape to seal off the connector and let it hanging there. Close the TV back panel
I have been watching TV for 3 nights without menus/channels scrolling. NO AVAILABLE red message when watching DVD is no longer existed.
Take the tv aparts.Take the tv manual control board aparts.Reajusting the board and screws it back in.Should solved ur problems,if not than the whole tv Tuner signal board is the causes and the problems.That the board,where the incomming broadcasting signal board plug into it,this board have intermittent problems and the causes.Try website like Ebay.com t buy a whole refurbish tv Tuner signal board for the replacement.
Have you tried covering the IR eye on the front of the TV when this starts occuring? Sometimes other devices in your home can emit infrared light that in rare cases can be picked up by your TV as a command from the remote. If covering the eye seems to stop the problem, I would say my guess is correct. If the problem continues even with the IR eye blocked I would say that the internal tuner of the TV might be defective. good luck!
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 =)