Well this darned system just wiped out a lot of writing. Shoulda followed my own advice on this one and copied and saved once in awhile. All of a sudden the page just reset and up in smoke. Aggravating! Shades of what happens to Dave Atherton.
There are at least 5 Aladdin modules, Neil - Transfer Switch module for AC, DC module for 12v house and solar, tanks module, temp. & compass module, and the Video Coach Systems Monitor master module they all plug into ultimately. There are also at least 3 Bus Taps (junction boxes) between the first 4 and the master module. Four modules and 2 bus taps on my rig are in the waste tank bay with the solar controller, curbside just forward of the rear wheels - the bay with bottom edge latching instead of a handle.
I'm not up for writing my full thesis all over again, so will just say I think you might check first the lead from the master module to the bus tap that should be nearby it (according to my diagram). I say that because you indicate the engine and camera side works okay. There is an engine data lead plugging into to the master top left side, and the camera power lead left side bottom. They are probably okay. The main lead feeding data in from the other 4 modules plugs into the master module between the engine and camera connectors. I'd check that lead, its connectors at both ends, and all the pins that may exhibit resistance-causing corrosion.
I wish I could tell you where the master module is. I've never seen it, so I suspect it is either behind the panel the reset switch is on, or perhaps underneath the drivers left side switch console. Depends on which coach model you have I suppose. I know it's not in the electrical bay or under the top dash port on mine. There is an Aladdin module in the electrical bay, but it is for engine data transfer I think; it's not what we're looking for. Maybe another member here can clue us in.
It's a place to start I guess if resetting doesn't work. Hopefully its not something internal with the master controller module, since Aladdin parts are hard to find. If it is haywire, I'd locate someone who can repair electronic circuits; I've been learning how to repair circuit boards because its the world we live in now, and pcb's like these are spendy. More often than not its a 2 cent resistor, or a micro-cracked solder point or something. Better 2 cents than 200 bucks.
Joel (just my 2 cents)