CAN'T CHANGE CHANNEL MANUALLY AND REMOTE DOESN'T WORK
The remote does not work. When the buttons on the set are used, they don't work. When turned on manually the channel where it started is fixed. You can not change the channel nor the volume. However, when the "INPUT" button is pressed repeatedly, the channels change and move up in number continuously. The automatic changing of channels can't be stopped.
The picture and sound on the "fixed" channel is OK. However, the other control buttons don't work except for the ON/OFF button. Can you tell me what part is defective? Thank you
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Use any digital camera, turn it on, aim remote at camera's lens, press channel button on remote and look for a white spot on the camera's screen when channel button is pressed.
If you do see a white spot, the remote is working but the receiver in the set itself or the succeeding circuitry has failed- time for warranty on either set or remote.
look carefully in the manual to see if it has a lock out where all or most buttons do not work--also the remote can be tested--every button--testers are common and also a digital camera in a dark room will react when remote is pointed at it and buttons pressed--flash on camera screen--either the remote or likely the set has it locked out in some way.
Not familiar with your model, but the problem sounds generic. I am guessing your set is hooked to a cable tv box, and that is where you need to change channels. I also guess that when you changed channels on your TV you probably moved from channel 3 to either channel 2 or 4 and the cable tv box is not sending to those channels so you lose picture and sound. Now, more guessing, you try to put the channel back to 3 on your TV, but still nothing happens. OK, if close so far, there are a couple of things to try. First, be really sure you are actually going back to the same channel you started with. Assuming you don't actually have the signal coming in on an auxiliary line-in and that you had it coming in on a channel, you may need to reset the presets on the television so that it recognizes the one important channel the cable tv box is sending out -- just follow your television menu to select or set channels. There is one more possible easy problem ... I have seen this one happen, after getting the channel correct and reset, if it still doesn't work, you mght need to turn the set off and wait one minute, then turn it back on WHILE the cable box is ON. This can cause the set to RE-Latch onto the cable box signal. It really doesn't sound like something is truly broken or needs replacement, sounds more like a user error. If your set is still under warranty, just call the Panasonic hotline (find it in Google, and they may be able to walk you through exact instructions for your model). Hope this helps.
Lots of possibilities. If you are using the remote, try also using buttons on the TV to change channels. If TV buttons work, the remote is broken or perhaps try changing batteries and cleaning battery contacts on the remote. If neither work, lots of other things to try. You may need to set preselect channels, so your TV thinks there is only one channel out there until you do. If you are on a cable box you just need channel 3 and change channels on the cable box. I can't tell what you mean by "audio changes with the channel" ... if you mean that when you try to advance channels, it increases volume and moving down in channels lowers volume that would be strange -- if you are using a programable remote it might not be set correctly (try another programming code). The "blurred" picture is probably symptomatic of having the set on the wrong channel, and if you could set channel it might clear up ... I'd start with getting channels to change. If you need more help, give the brand and model of TV, say if you are using a remote (original or programable), and what the 'audio changes' comment means in more detail. Probably worst case is that your tuner circuit is fried, but don't assume that without more diagnostic.
I've run into this same issue. Although not a complete fix, I was able to program the tv with a basic universal remote. Try using the Goldstar remote codes. While I'm unable to use the channel buttons, I can change channels manually and turn the tv on/off and use the volume button. Again, not a fix, but a work around for now.
The remotes have several device keys at the top of the remote. They have abbreviations like "VCR", "DVD", "TV", "CBL". By default some actions are locked into a specific key. By default, the volume buttons will always control the TV volume and the channel buttons will always change channels on a digital box.
If you have a digital box, and the channels wont change, the default locks might have been removed. Consult the instruction manual that came with the remote and re-lock the buttons to the correct device key. Otherwise you will need to press the "tv" button when trying to change volume and the "cbl" button when trying to change channels.
If you do NOT have a cable box and are just simply trying to use the universal remote as a primary remote, you will need to unlock the global channel lock. Consult the manual for the remote or check online for the remote guide. The Company which makes the remotes is called Universal Electronics and you can find digital copies of their manuals on the Brighthouse Websites.
It sounds like a stuck button on the TV. Probably a channel button. Try tapping on each button to get it to stop. If it does, then use the remote from now on. If I was repairing the set here at my TV shop I would open the set, turn it on, and unplug the buttons while it is running. If it stoped changing channels then I have the proof that it is the buttons causing the problem. If it did not stop with buttons unplugged then the tv would need a circuit board. The Brand and model number posted would let me look at the schematic.