Just came back from my 7 day vacation and have the same issue with the model Y, same as what the OP posted, tried the reboot, the model y drives, signal lights, break lights, dome lights, headlights but no screen. Model 3 is working find. Will post in the Model Y forum, just reporting the same issue with the screen.
Thinking about doing the Contractor Disconnect, this will reboot the whole system if I can get the back seat off.
Model Y is 36.5.6 (Screen not working)
Model 3 is 36.5.1 (working)
Fred