By "Dead" what exactly do you mean? No display, none of the keys function, what?
I believe there is an in-line 10 amp fuse near the hydraulic pump, that if blown shuts off the control panel.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top