On January 29, 2018 at 21:17, Fins said...
Isn’t that Allen screw a security type that has a pin in the center of the head and requires a bit with a hole in it?
That one isn't. I wrote that I used a 5/32" allen wrench to remove them. That's what I used. I would have stated if they were security screws.
On the inside and outside of the part that attaches to the back of the TV, there ARE two security head screws. Part of the assembly blocks one of the security screws on each side.