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Re: tv switching back and forth from three seperate...
The only thing I know of that can do what you are seeing is if something has spilled into the set and has contaminated the pushbuttons under the volume/channel buttons. If the Channel Up pushbutton has fluid in and around it then it can conduct and the microprocessor thinks you are telling it to go up through the channels. The only way to fix that would be to disassemble the set and pull out the PC board which has the pushbuttons on it and clean or replace them. If you do not have experience working inside TV's then allow a qualified tech to handle it for you.
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there should be a switch in the back of the vcr to change to broadcast channel. either ch3 or ch 4 switch to channel 3 and test. then switch to ch 4 and test make sure the tv you are attaching to is ON channel 3 or 4
Both previous solutions are correct, but there may be another step. Sometimes the switches are hard to see because they are small and hide near the antenna in and out jacks. But some newer VCR's don't have a selector switch at all. To choose between channel 3 and channel 4 output, you need to use the VCR's setup menu. So if you can't find a switch like the other posters mentioned, check the VCR setup menu for an output channel selection. Then, as previously mentioned, make sure that the VCR output channel is added to your TV's channel lineup.
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You probably have to find your original remote to the set and go through setup in your menu. On most sets, there will be a menu item which will allow you to switch from Cable mode to Air mode. If you have no Cable connected, then you must set tuner in Air mode.
If you are using an external device to run on channel three, then try this:
Make sure device (rather it's a vcr or game console), is hooked up to your Antenna Input connector. Also, some of these devices will have a small hidden switch on back that says 3 and 4. Move the switch to 3 position. Turn on device. Go into TV menu and do a Channel scan. This should auto program any device hooked up to the TV antenna input jack to channel three.
Keep in mind that you may not receive anything by Feburary of this year without an HD converter box to tune in channels with and outdoor antenna.
The problem your describing can be contributed to your cable box. Depending on your cable company there are times when the box has trouble translating the signal to the tv. You tv is operating normally. Suggest to the cable company to switch your box.
I went to add/delete channels in my menu on my symphonic and it let me scroll through the channels, make sure you have them all set to add (by pushing the volume buttons to make them light blue instead of purple)....after adding all of your channels (or just the one if you use dish) just power the tv off while on a channel and then power back on and you should have tv.