First, unplug your QD, the gray plug to the left of your batteries that have black and red cables going into it. shake, tap, blow those out and reconnect. Try operating and see if that works. I know it sounds simple, but I've had tons of machines do this after washing. Not sure if the water jumps between terminals and creates a different route for the electricity, or what.
If that didn't work...does your machine have a contactor? Disconnect your batteries at the QD plug. Look to the left of them, above the charger. There should be something that looks like a small black box with 2 posts on the end of it. There are also spade terminals underneath, with 2 wires going to each end of a diode. Make sure those 2 wires are connected and that the battery cables going to the 2 posts on the side are on tight. Have someone activate a function and see if that box makes a clicking noise. You can also test continuity between the 2 cable posts while someone activates a function. If it doesnt click/have continuity while activating a function, then jump the cables together on one post. Reconnect your QD and test. If it doesnt work on one post, try to swap them to the other post (I forget if this matters while doing it). If this works, then replace your contactor. They can also usually be pretty easily repaired by opening them up, cleaning the contacts in them, and then closing back up with the spring and everything installed straight.
Let me know if this works or not, then I can guide you through more troubleshooting. 95% of the time, one of these things are the issue with our lifts.
