2 Troubleshooting ● Printer education and training on page 7 Troubleshooting ● Firmware update on page 7 ● Print-quality troubleshooting on page 8 ● Troubleshooting system error codes on page 8 ● Performing a service test on a failed assembly on page 8 ● Performing the necessary service calibrations on page 8 ● The printer does not power on on page 9 ● The printer hangs during printing and displays ‘processing’ on page 9 ● The printer continuously rejects printheads on page 10 ● A new maintenance cartridge is incorrectly detected as ‘used’ on page 10 ● Cover sensors are not working on page 10 ● The Line Sensor has problems detecting paper on page 10 ● How to remove the Left Hub when the actuator is broken on page 10 ● Troubleshooting paper jams and printhead crashes on page 11 ● Troubleshooting shutdowns on page 12 ● Vacuum suction much lower at high altitudes on page 13 ● Banding at variable extreme environmental conditions on page 13 ● Printhead crashes/smears on high-density prints using coated paper on page 14 ● Banding due to ink cartridge replacement while printing on page 14 ● 34" Rice Paper not supported on page 14 ● Worm marks on HP Coated Paper with light area fills on page 15 ● Solving paper-handling problems on page 15 ● Difficult to load paper:
“Too much skew” on page 15 ● How to read the power switch LEDs on page 15 ● How to read the Formatter LEDs on page 16 ENWW 5