HP LaserJet Pro 400 Service Manual - Page 204

Table 2-7 Event-log messages (continued) Event code Description 59.3000 Fuser motor startup error 59.4000 Fuser motor error 59.5000 Image drum motor startup error-black 59.5300 Image drum motor startup error-yellow 59.6000 Image drum motor rotation error-black 59.6300 Image drum motor rotation error-yellow 59.7000 Black developer motor startup error 59.7300 Yellow developer motor startup error 59.8000 Black developer motor rotation error 59.8300 Yellow developer motor rotation error 59.9000 ITB motor start error Table 2-8 Event-log-only messages Event code Description 20.0000 Memory out 54.0100 Environmental sensor error Solution 1. Turn off the power by using the power switch, and then wait at least 30 seconds. 2. Turn on the power and wait for the product to initialize. If the error persists, break the job into smaller jobs that contain fewer pages. If the error persists, update the firmware. NOTE: For memory-card models, adding memory to the DIMM slot might help solve this problem. Verify that the DC controller connectors are firmly connected. If the error persists, replace the temperature/humidity sensor. If the error persists, replace the DC controller. 178 Chapter 2 Solve problems ENWW