But the Magnavox requires it's own remote. Most annoying with universal is "OFF" == Mute. Never did find an on/off. Did find the remote. Lost again, so now it's like the old TV. Get up and turn off the TV. Cable box controls the channel, and sound system controls the volume.
Of course the grandkid has found the control buttons so sometimes it takes a bit of fiddling to get everything working correctly.