Go to a cable channel 1st that uses writing from the TV show like QVC, or a weather channel or news channel that show that banner bar at the bottom. Let's make sure its lettering isn't backward either, because there is a picture flip setting in the service menu.
NOTE if the picture is backwards.
Then NOTE if the below service menu is backwards too, and let me know OK?.
There are 2 possible service menu access procedures, the service manual shows both -
1] Power OFF TV, then press INFO MENU MUTE Power On TV. Wait 5 seconds for the Service menu to appear.
OR 2]Power OFF TV, then press MUTE 182 Power on TV. Wait 5 seconds.
HV Flip is in the OPTIONS section. Use your arrow keys and OK button to maneuver to it, and OK to select it.
Remember the present setting, then try the H FLIP setting if your menu is backwards. Remember this will flip the MENU AND PICTURE, not just the menu. That's why I said to check the channels that have their banner on the TV screen FIRST.