I haven't found a manual but the HP website says this:-
HP LaserJet 4L Printer - Intelligent On/Off
ISSUE: Intelligent On/Off replaces the power switch.
SOLUTION: The HP LaserJet 4L printer goes into Intelligent Off mode after 15 minutes of non-use using only 5 watts of power per hour (180 watts on the average during printing).
The printer powers on instantly when you:
* send a job to the printer
* touch the front button
* open the printer's top door
* insert paper into the printer
If I find any references to online manuals, I'll let you know.
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