hi everyone
hoping for some help troubleshooting our trusty hyster... yesterday we charged it up, topped off the battery water and I spent some time with baking soda and water to clean up the corrosion which was really getting bad. finished up and it fired right up - moved it to its parking spot and left

this morning I went to use it and the LED display fired up but instead of going to show the battery level it stayed at dashed lines across the board and the wrench light is blinking.

battery shows read 37.6 volts on multimeter at plug

buttons on readout will not let me navigate the display

I did notice that I do not hear a click from the seat weight sensor - though I checked cord with mulitmeter and it seems to function when someone sits on it... could that be it?

any other Ideas/things to check?