My tv keeps loosing channels after retuning i have even gone back to factory settings. after you turn the tv of and leave it for a while and turn it back on it loses channels.
Main system control memory IC fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
SOURCE: lg lcd 37 inch tv loosing sound
i have the same problem and find that if i freeze then unfreeze the screen it works
SOURCE: TV losing its channel memory
I had the same problem. I replaced the EEPROM marked U33 (it's a 24C32 in a smd package) and the TV worked fine.
BEFORE replacing the EEPROM you have to go into the Service Menu (hold down VOL- and CH+ on the local command) and take a note of all the values, specially the R,G,B gain and R,G,B bias, in the "standard" picture mode as well as in the "Cold" picture as well as in the "Warm" picture mode.
(if you forgot to do this, here are my default values:
R gain: 434
G gain: 482
B gain: 484
R bias: 270
G bias: 270
B bias: 264
then you put the "Cold" image mode and set again those values, increasing the G bias to about 300 and the B bias to about 310.
then put the "Warm" image mode and set again those values, increasing the R bias to about 300 and the G bias to about 280)
The other values such as brightness, contrast etc, have to be left at 50.
I hope this solution will FixYa!
SOURCE: Have a Pioneer PDP508XDA its asks for a password when tuning
Default password is always 0000
SOURCE: samsung le26r74bd won't retune digital channels
Updating the Channel List Automatically You can update the channel list when the broadcaster adds new Services or if you move the TV to a new location.
1. Press the MENU button to display the menu. Press the ▲ or ▼ button to select "Digital Menu", then press the ENTER button.
2. Press the ▲ or ▼ button to select "Channel", then press the ENTER button.
3. Press the ENTER button again, to select "Country".
4. Select the appropriate country by pressing the ▲ or ▼ button. Press the ENTER button to confirm your choice. Even though you have changed the country setting in this menu, the country setting for Analogue TV is not changed. (Refer to page 11 of the user guide)
5. Press the ▲ or ▼ button again, to select "Auto Store". Press the ENTER button. When it has finished, the number of scanned services will be displayed. The existing favourite channel list will not be deleted when the channel list is updated. To stop the scan before it has finished, press the ENTER button with "STOP" selected.
6. Press the EXIT button to exit. If the signal status is poor, the "No Service found! Check the aerial connection" message is displayed. Check the aerial connection and the try the procedure again
SOURCE: Tuning problem
You may lose some channels when you retune the TV as the channels have been rearranged. To locate them look at the EPG although you may still find that some channels are no longer available on FREEVIEW. See the following link for additional information
http://www.freeview.co.uk/_retuneinfo/
If the above process does not work then check the link above for additional information and also visit the accompanying site links below to find more information for your model of TV / FREEVIEW box.
For troubleshooting the retune procedure visit http://tvretune.co.uk/troubleshooting/
For specific model information visit http://tvretune.co.uk/productmanuals/
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