I have a lifetimed TCD746500 that I’m thinking of preparing for resale. I plugged it in yesterday to check for software updates. It was set for SD menus so I changed it to HD. Unfortunately, my previous TV is on the fritz and, apparently, the spare one I have won’t display the HD menus. So now, I have both TiVo and TV running and there’s no display. I can’t figure out anything to swap it back. I did unplug it - when it restarted, it displayed the usual restart screens and showed that it was installing an update. After that finished, it’s back to no display. I searched the forum and didn’t find a thread that applied here. Thanks in advance for any help.