If on auto-pilot with an incapacitated crew. . .why was it flown to 44,000 ft?
If you thought you had a tire etc. on fire, would it make sense to try to go to high altitude to ‘starve’ the fire of oxygen?
If they thought it was an electrical fire, and pulled the circuit breakers, would that also cut out voice communications?
Maybe someone with knowledge of these systems can tell us what ‘breakers’ are readily accessible in the cockpit, and what systems would be disabled by pulling these breakers.