When the plane loads, either on the ramp or the runway, the EFB shows all circuit breakers except for the flap motor and standby flap motor as pulled, but they don’t appear that way on the physical panel and only the flap motor circuit breakers are functional.

Consequently, nothing electrical works except for GTN, GNS, transponder, and radar avionics and related avionics switches, and lights. No other avionics (KX 155B, AP), engine-related switches and gauges, annunciator panel, etc. work. No failures are shown in the EFB. I have reset all potential failures.

The plane will load on the runway with the engine running and flies beautifully but no engine-related gauges work. On the ramp, no engine-related switches work for a cold and dark start.

I have reinstalled the file several times, reset the XBox console, and finally reinstalled the sim itself and all add-on files. The presence or absence of add-ons has no effect.

I have had zero issues with previous BS releases, including the recent Baron/Bonanza Professional bundle, which I just used for a circumnavigation of the continental US.

Not sure what I am missing at this point. Any suggestions are welcome. Thank you!