Mine, apparently, is different, and I know because I recently had to reattach the tv after finding it nearly on the floor when returning from a road trip. It had bounced free of the wall, snapping the coax cable and was only saved from complete smashing by the still attached power cord = 3 inch scratched screen.
There was a frame attached to the tv which has two hooks that hung onto a wall bracket. It was supposed to be secured with two looooong screws that were on the bottom of the tv frame that once tightened would lock it to the wall frame.
It was difficult to get to so I'm guessing it was never tight and murphey finally had his way. Knowing how and where to blindly work a screwdriver I got it on nice and snug, hopefully I'll never need to remove it.
2008 Jayco Eagle SuperLite 29.5
2014 F250 6.7 PSD 4X4, CC LB