This has happened to me twice now. I have been watching videos on running the flight compartment checklist. In the checklist I performed the bleed air tests and the switches worked fine. After a break and running the engine start checklist, these two valves no longer work. I thought maybe a CB popped but all are in. If I look at the synoptic, nothing moves when I press the switch buttons. I have good AC and DC power. My only recourse is to start with a new cold dark aircraft.
I don't think this is a systems issue but more of a glitch in the aircraft. Anyone experience this?