HP LaserJet 9000 Printer series - Manual (Page 133)

Chapter 5 Problem solving 133
Correcting output quality problems
Printer is turned on, but internal
fans are not running. Make sure the line voltage is correct for the printer power configuration. (See the
plate next to the power receptacle on the back of your printer for voltage
requirements.) If you are using a power strip and its voltage is not within
specification, plug the printer directly into the power receptacle.
Printer voltage is not correct. Make sure line voltage is in the correct range. (See the product label next to the
power receptacle on the back of the printer for voltage requirements.)
Situation Solution