KYDan is right.
Two slots on the face trim at the bottom.
A flat blade screw driver works real well.
Mine had 4 screws holding the unit in place.
An extra set of hands will be helpfull to hold the unit while you chase down the problem.
The first time they (dealer) replaced mine, the 'video out' cord was not connected so I had no video.
I had to take everthing apart at the campsite to find the problem.
It is a rats nest.
2009 Flagstaff 8528 RKSS
2007 Toyota Tundra DC 5.7L V8
Pullrite Superglide 14K
Air Lift 5000
Prodigy Brake Controller
"I've got a mind like a steele.. a......a steele......um.....uh...... what's that thing called again?