Table 9. Control panel light messages (continued) Light status Condition of the printer Action Fatal error All lights are on. z Turn the printer off and then back on. z Unplug the printer for five minutes, and then plug it back in. z If the printer still has an error, see chapter 6, “Troubleshooting.” Accessory error All lights are blinking. (HP LaserJet 1300 series only) z Remove the DIMMs and reseat. See the user guide for instructions. z If the printer still has an error, replace the DIMMs. 32 Chapter 2 - Installation and operation ENWW