If you mean the Jensen system under the TV it is just held in place with wood screws, I found that out when mine started falling out on a trip. If you need to access the back of the TV you need to remove the two lenses from the bathroom vanity ceiling lights then lift the mirror straight up to the ceiling where it will lift off the 4 screws that the brackets hook over. Check your brackets once the mirror is removed, my top bracket was detached and I had to re-attach with 3M double sided tape, the thick kind.