There is an inline 10 amp fuse in a fuse holder going to the touchpad. Comfirm it is good. Check out the 0056 LIPP sheet by Lippert for testing of the hydraulic pump and Trombetta. You could also contact Lippert directly at 574-537-8900. Agree that battery voltage is critical. Test the battery when disconnected from shore power to determine if battery(ies) are good using a multimeter.
Chris & Maria
2012 36RL, Full Body Paint, Dual Awning, Dual a/c, Splendide Combo, Fisher Paykel dishwasher, 6.5kW Onan, Goodyear G614's. 2015 F550 6.7l, 4X4, Lariat, CC, 176" WB, Long Box, B&W Companion