It seems that whenever I am on ground or APU power (yes, APU gens on), I lose all avionics power after a few minutes. Everything shuts down, including the FMC. This makes realism a tad difficult, because of not wanting to waste fuel going through pre-engine-start checklists and IFR clearance. ;)

Check this thread:http://forums.avsim.net/dcboard.php?az=set..._page=show_mesgAnother workaround is the registered version of FSUIPC and extended battery life.

>Another workaround is the registered version of FSUIPC and>extended battery life.I do actually have reg'd FSUIPC, so I'll give that a shot.Although, from a realism perspective: is DC power really not provided when running off APU gens? I'll check the TRs next time I do a startup, but I seem to remember everything working (for a limited time) with the battery switch off.Thanks!