Try this:

On the Co-Pilots Side Panel.

B14. BATTERY SWITCH PANEL -
Turn on the Battery Switch (Shift+M) - Pressing Shift+M also turns on the 4 Generator Switches listed in the next section.

B01. ELECTRICAL PANEL -
Turn ON the Main External Power Switch.
Turn ON the 4 Generator Switches.
Turn the Frequency And Voltmeter Selector Switch to CENTRAL TIP BUS

B07. ENG START CONTROL PANEL
Turn on the Starter Switches for the engine you want to start first, they are in pairs (1 & 2, 3 & 4, 5 & 6 and 7 & 8).

I'm working on something more substantial, but I can and did get them started that way. Also. I did pull all engines into reverse (F2), then I returned them to the stop position (F1), then move them slightly forward of the stop (F3). I do this when N2 reaches 20%.

Hope this helps.

Mark