Yep,
As you stated it is very straight forward in the classic. I don't know in the NG and don't remember too much about it coz i flew it few hours 4 or 5 years ago.
What I meant in the question is:
After you have done the NNC and the APU cannot be connected to the bus... Do you keep on doing checklists while you divert to an appropriate airfield or just keep the lights illuminated?