[rescue] Power saving modes, was Re: advice on rescuing an e10k

[Wesley W. Will]

> This is in contrast to my HP LJ4+, which always has an exhaust fan
> spinning... 

Odd.  Mine doesn't.  The exhaust fan only runs when not in powersave 
mode, which interval and delay is settable on the main control panel. 
It draws very little current when idle, and I have the timer set down to 
a low value so it shuts back off quickly after a print job is finished.