As a few others have pointed out: EXT PWR 1 cannot be connected to the buses at the same time they are fed from engine generators. Interesting note: EXT PWR 1 indicates that the external power contactor is closed ("ON" illuminated) but ext power 1 is not available ("AVAIL" not illuminated). This should not be possible.
EXT PWR 2 shows "AVAIL" but its contactor is open. This is a realistic scenario (ext power plugged in but not on the buses).