IF you go back and read the first two answers on this page, they are the correct ones.
I pressed and held the home & back/return buttons at the same time for about 30 seconds. Then in the upper right hand corner of the screen I saw a tiny popup that said something like “Registration for the remote has been disconnected.” The cursor on my screen disappeared. I even turned my TV off and back on again to make sure it would stay gone, and it did. It was gone, gone gone.
Then I tried the second answer posted on this page to see if it worked just in case I ever want that annoying cursor back. I pressed & held the scroll button down and saw another popup in the upper right hand corner of the screen that said “Registration for the remote has been connected.” The cursor showed up again. Don’t know why the folks at the LG help centers won’t tell us this, but these solutions really do work. Thanks to the first two posters for all your help.