Ok, thanks guys, I got it. Believe it or not “No Screws” someone had placed double edge adhesive behind the edge of the board against the wall. The 2 ells should have been fastened to the wall but there weren’t any screws in the wall part at all. Carefully I pried it loose from the wall and it came clean. No problems just have to figure a better way to fasten it back in case I need to remove it in the future.