TV is about 10 yrs old. In setup mode i have autoprogram and below that i have channel memory. Channel memory has a stored or erased option and i have stored all channels that i normally get. When i select autoprogram the channel memory starts erasing all the channels that i have stored. Even as i store each channel one by one, they still will not come in. TV was given to me and when i first plugged it in i was able to get ten or so channels but since i tried auto program.....no channels. Thank you very much.
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It sounds that the main system control memory IC to your TV is faulty. Replace it, and re-program it with initial data values. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. http://electronicshelponline.blogspot.com/ Pull up older posts there.
Your TV has to be initilized. It should be retuned to get the channels memorized in its memory section. Then only you can get the channels stored. Hopes that you have its remote control hanset with you. Replace two new cells in it and proceed the folloing steps. Connect ariel to its back socket before doing these.
 Press power button on the front panel of your tv. The initial setup screen appears.
 Press Ch+ on the remote control handset or on the front panel of your TV to start auto program, or Ch_ button to exit.
The initial setup screen will appear each time you switch on the tv until you perform autoprogram.
To perform autoprogram again
 Press Menu button.
 Press to highlight Channel Menu
 Press Pr Dn button to hilight cable. Press [+] to select.
 Press Prog Up or Prog Dn to hilight On or Off according to how you connected your TV. Press [+] to select.
 Press Prg Dn to hilight autoprogram. Press [+] to search for channels.
 After autoprogram finishes, press "Menu" again to exit.
TO RESET THE TV TO FACTORY SETTINGS
 Turn TV on.
 Press and keep hold the "Reset' button on the remote control hanset.
 Press and release the "Power button" on the TV front panel. The TV will turn itsef off.
 Release "Reset Button" now from your hanset.
These are the processes to be done to either autoprogram or turn it to factory settings. Ok.
Press Menu on the TV (second button from the left) or the remote. Use the Vol + / Vol - buttons to highlight Tuner, only available when the input is the TV (press TV/AV to get to the correct source) mode. Press Ch+/Ch- to highlight AutoProgram and then Vol+ to start the search for channels. The TV will show Tuning Finished when done and then go to the lowest channel found. If you want to add or remove stations, tune to the desired channel, then press Menu, and highlight Tuner, Ch+/Ch- to highlight Add/Erase, then Vol+/Vol- to set Add or Erase. Press TV/AV/Exit to get out of the menu.
Try hooking up the dvd player and turning it on. Then use the setup and add/erase channel feature to look thru all of the channels. On my older GE tv I found that channel 91 was the correct channel for the video input. I saw the logo for the dvd player on this channel. I just added that channel and now it works. Your channel might be different.
With the menu set to cable signals, the autoprogram should catch all of the cable channels. The Cable Channel option allows you to use either channel 3 or 4 as the "cable" channel. This is when you have an external box that you use to tune in cable rather than the TV directly. The easiest way here is to autoprogram the TV while playing a VCR tape. That will insure that channel 3 is included.
there is a menu that has autoprogram in it, use that and itll scan all channels and memorize the viewable ones. Sometimes it is a stand alone button behind a door or it is in the setup menu. Make sure your antenna is plugged in. If you have cable, the only channel that may be stored is 3.