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Hello Check whether any control buttons on the front panel of the TV is strucked or not. It is best to replace all microswitches of the front panel of your tv. You have to open your tV and detach the control panel printed circuit board, desolder out one microswitch among them for a sample, and go to buy a new one. Replace all the switches at the same time. It won't cost more. They are very cheap to buy. You can bought it from most of the electronic spare part selling shops at your town. OK.
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.
Problem with channel skipping has rectified itself. I simply unplugged the set and and started over with remote intructions on signal and channel setting. The tv was also turning itself off and on, this also has ceased. Thanks, hope I don't need you later.
TV worked FINE for the past 2 yrs---this morning we woke up and the screen is totally BLACK! No sound..nothing. REmote doesn't do anything to the TV. Red light says ON unless we unplug it. Remote won't turn off the TV.
Any advise? Picture tube??
Worked great w/out any problems until we woke up today!
My tv will not turn on. We had been away for a week and no power interuption at home. We have unpluged the tv for short and long periods of time . We we attempt to turn the power on it cuts off by itself.
your system control section has failed due to sudden power failure.
1please check power to system cotrol.
2check tunning &aft ckt in system.
3check memory ic & its section
4check system ic & its section