Whenever I turn the TV on, it automatically starts going through the channels like one of the buttons is stuck. I took the batteries out of the remote to eliminate that possibility, and that didn't help. I then took the TV apart to examine the circuit board that holds the buttons on the front of the TV. I cleaned all the buttons with alcohol, cleaned connections, and cleaned the dust off everything else, just like I was taught in electronics school. That fixed the problem for 24 hours. I turned the TV off for the night, and the next morning, the problem returned. Any suggestions or other possibilities to try would be appreciated, because now I'm stumped!
I have the same issue with my INSIGNIA TV too ... Pravin ... can u please throw more emphasis on to "replace all the Front Panel micro switches - there will not be more than 6-8. Do not waste time identifying the faulty switch" and I will be really needing a step by step instructions !!!
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Re: TV changing channels
You seemed to have good knowledge and sense. You did the right thing so far. But, since the problem has reappeared, I suggest that you - at one stroke, replace all the Front Panel micro switches - there will not be more than 6-8. Do not waste time identifying the faulty switc. After all it is only around half a buck a switch! And time is more valuable.
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go into programming mode and search for channels it will do this automatically to find all antennae and all cable channels if this is hooked up to a receiver box then only channel 3 will be found or used also most tvs are computerized these days and at times it will need to 'rebooted' unplug the power and wait 10 seconds and plug it in again this may have to be done whenever you are locked out from changing channels or using the volume controls
Be sure your remote hasn't got a button stuck down which is changing channels. If not, take the batteries out of the remote. If this stops the channel changing there is probably some conductve material stuck across the circuit board
inside the remote. If this is the case you have to check inside the remote by openning it up.
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
Are you changing channels with the remote? Try taking the battery out of the remote, its buttons might just be getting stuck? If, when changing the channel by hand, it persists, then it is an electrical problem, and you should contact LG to see about getting your unit replaced.
There are a few things that can cause this. #1 most often cause is
either something spilled on the channel button or something wrong with
the bezel where the buttons are located causing the button to be
pressed all the time. Check the buttons on the tv and make sure none of
them are stuck. #2 is a bad button (switch). Replace the switch or the
control board. #3 is a short on the wiring harness going from the
switch to the mian board. Maybe it's squished against the frame
somewhere. #4 would be a bad main board. You will likely have to take
this unit to a service centre to have it looked at.
if the channel change is going up the channel up button on the set is stuck or shorted. if the channels go down then its the channel down button on the set that is stuck or shorted. also check with the manufacurer for software upgrades.
"...it's possible that one of the front panel buttons is "stuck" or shorted, and this could cause the TV to ignore commands from the front panel or remote. But this should also cause the Power command to be ignored, too. You might try pulling off the front panel and disconnecting the front panel buttons and then see if the remote works."