Yes, the clock reverted to a blinking 12:00 when I did the Ch UP / Ch DOWN reset. I also tried leaving the unit unplugged over night, hoping it would lose all settings and prompt me for the initial setup. But all it asks me is to select the language and aspect ratio of my TV.
See Page 23 of your manual "Setting up the TV Guide On Screen"...it says AFTER you do what it says: press DVD Power, Select Language, Select Aspect, then the TV Guide Setup begins..where you can enter zip code, etc. Worth a try. Above sounded like when it asked for language and aspect, you did not re-enter language, press Enter; re-enter aspect, press Enter..and see if next comes up is the TV Guide Setup so you can change things back to what worked. I think it is supposed to show you what it was set for previously.
Also read elsewhere that if you put different channels when the TV Guide is set up, it can cause major problems (not defined). Maybe your channel scan did confuse the setup.
Another thing I read is that the TVGOS can be gotten from OTA.
Maybe as a last resort, connect a rabbit ears to your recorder and let it get the TVGOS from the antenna and once it has the right channels again, go into setup and change to your Direct TV as your input signal...something along those lines may work..or not.
Just more suggestions.