The TV screen asks me to run channel auto scan. How can I do that ?
Can you access your menu? Or are you stuck on that screen and can't get out of it?
If you can bypass the screen, all you need to do is access the menu and follow this information --
Now, if you can't back out of the Auto Scan request screen, unplug the power cord on your TV set for 5 minutes. You may have a locked up micro, and unplugging it for that period of time will reset it.
Did you recently do a software update to the TV set ? If so, do it again as it sounds like it didn't download correctly.