Just an add on from tbe previous post. The replacement tv,even though it was the sane brand it was a 2016 model and the other was a 2014 model. Go figure it is a 2016 rv!
Anyhow the bracket mounting holes do not line up and you have.to remount them by turning them 180 degrees. That way the screw holes line up. Also there was an extra bracket that has to be removes so it sits flush. The new tv has a thiner bezel and just clears the upper cabinet when mounted. Hope this helps, for those who tackel this themselves.
Now just have to install the sound bar.