Captain Sim wrote on Apr 25^th, 2012 at 11:53pm:

Back on topic: Again, most likely the real reason of the power is fsx menu use = paused flight sometimes causes the sys.gau glitch. Anyone to confirm this? The question is: Does anyone experience the power issues WITHOUT using fsx menu or pausing a flight?

I have the power issue without using the fsx menu.

Loaded the CS 737-200 cold/dark seatle flight.
Battery on
#1 aft boost pump on
start APU
APU bleed open
Isolation valve auto
AC/DC selectors to Standby and APU Gen
position lights on
galley power on
packs 1 on

wait 11 minutes:

radios dead
instrument (altimeter?) sound stops
amps/volts look okay
pneumatics normal with APU running

Then I shut down APU, and battery.
Now, Battery on = no battery power. I am able to flip all switches, but there is no electrical power.