I had a xr 4000 my buddy had to reboot the box in order for the remote to work properly!!!
the remote was slow
press a button would not do anything
hold the power button down scroll down to restart
and worked!!
yes it may not work for all
your red light coming on the remote when a button pressed if not it’s the remote I had 2 bad remotes with this problem
arq-100 remote awesome too
just sayin