Many thanks for your replies!

Lou, my default flight is set to the C172 in Cold & Dark, everything off except for the avionics switch.
The ground power indicator light is actually off, although it appears to be lit. ;D

What I do, step-by-step when I start a flight with the 727 is, first of all, turn off window heat, pitot heat, packs, hyd pumps and all that sort of thing. Then I power up the battery, close all three BUS TIE*, turn APU on and when EGT stabilizes close APU GEN and FIELD, ESS PWR set to APU, Hyd B pumps on, packs on, etc (also turn to max the GEN frequency knobs)... then when it comes to start the engines turn packs and galley power off, get the engines started then follow the procedure for GENs' power setup as you describe on Mark's topic.

*- I'm a bit confused on how should the BUS TIE be handled, as the checklists tell to close all them three, and the fact that the BUS TIE causes the electrical power to be provided by one generator alone (if I understood correctly from your post). Should the BUS TIE be closed or tripped? Closed for one generator alone and tripped for the others?

Mark, Ctrl+E does the trick ;), better than the "aircraft reload" which can cause some pain under workloaded circumstances. ;D

Thanks again Lou and Mark! ;)