Ground functions cut out for no reason; 777LR

[greg100o 12]

When I choose the engines off option and load the airplane [using proper default flight first], the engines stop as they should.I then choose connect ground power, air etc, choose it on the overhead panel and the avionics come alive etc. Then I note that after a few minutes while I am programming the FMC, that all of the power suddenly cuts off usually with a warning horn, avionics go dead. This has happened several times.Battery remains on.The only way I can restore power it to start the APU.When I recently landed and wanted to connect ground power etc at the end of the flight, nothing happened when I pushed the buttons. I had the APU running but wanted to switch over.Am I doing something wrong procedurally? I would expect ground functions to remain active until turned off.ThanksGreg

[Guest Midnight LS1]

Do you have the parking brake set?

[MartijnPleines 0]

FS problem: the battery dies in a few minutes.Registered FSUICP has a function to stop it from happening.Or, as you already found out yourself, you can start the APU to provide power...or use external power.Best,Martijn

[Guest ags]

Martin, he connects ext. power.

[Guest xenopus]

Having the same problem. Also, after I start APU I have no external lighting. these only go on when I start the engines.What do you figure?

[Guest trevor51590]

>When I choose the engines off option and load the airplane>[using proper default flight first], the engines stop as they>should.I then choose connect ground power, air etc, choose it>on the overhead panel and the avionics come alive etc. Then I>note that after a few minutes while I am programming the FMC,>that all of the power suddenly cuts off usually with a warning>horn, avionics go dead. This has happened several>times.Battery remains on.>>The only way I can restore power it to start the APU.>>When I recently landed and wanted to connect ground power etc>at the end of the flight, nothing happened when I pushed the>buttons. I had the APU running but wanted to switch over.>>Am I doing something wrong procedurally? I would expect ground>functions to remain active until turned off.>>Thanks>>GregI figured this out thanks to this forum. FS ties power to the "." key. To get ground power back, reset your parking brake, hit shift+8 and reconnect your power. That should do the trick!