That looks like this:
This is described as the LCI "MyRV" 406345 if it helps your research. A quick Google search turned up some newer versions with more buttons so I assume they had some later releases. There are no support docs on their Web site which is common for older products that were made before that was tradition.
You should probably contact them directly to find out what to do with it, but if my guess is correct this panel is not the device itself, but rather just the remote display, and you'll have a control unit somewhere (try removing cover/access panels near or behind the unit and looking for another black box just filled with wires, terminals, and relays.) That screen would be the control unit, a touch screen that operates things like your lights, awning, slides, etc. It's usually installed inside the coach near the kitchen but might have been in a storage compartment as a convenience since that's when you'd often activate those things (while setting up camp).
If it doesn't turn on either it's dead or the control unit is.