FX+ 7S?

[rochrunner]

Having said that, you may have gotten water in/on the bike’s power controller. Hope when it all dries out that it works for you. You may need to do some part swapping to locate the failure. Honestly, I doubt it was the display, but of course many things are possible.

At least on Specialized e-bikes, the top-tube display is also the central controller for the bike. Get it wet internally and it will act pretty much like the OP's did -- you're not going anywhere without it.

 

[stompandgo]

The TQ is the same way. The display is the controller. The system itself has sealed connections, don't know about the display itself. If there's a seal between the display and the frame, that's on the frame manufacturer.

 

[Chazmo]

the top-tube display is also the central controller for the bike.

Interesting. In the immortal words of Johnny Carson… I did not know that!