HP LaserJet 4250 Service Manual - Page 372

Table 7-7 Numerical printer messages (continued) Control panel message Description Y Device Location 1 DIMM Slot 1 2 DIMM Slot 2 3 DIMM Slot 3 4 DIMM Slot 4 ZZ Error Number 0 unsupported memory 1 unrecognized memory 2 unsupported memory size 3 failed RAM test 4 exceeded maximum RAM size 6 invalid DIMM speed 54.1 Remove the sealing tape from toner cartridge The print cartridge was installed with the sealing tape in place. Recommended action 1 Remove the sealing tape from the print cartridge. 2 Replace the print cartridge. 55.X PRINTER ERROR For help press alternates with 55.X PRINTER ERROR To continue press 56.1 printer error To continue turn off then on The dc controller is not communicating with 1 Press ( SELECT button) to continue. the formatter. The problem could be caused by a timing error or an intermittent 2 Turn the printer off and then on. connection. 3 Reseat the connectors between the dc controller PCA and the formatter. 4 If the problem persists, replace the dc controller PCA. See Dc controller PCA. 5 Replace the formatter. See Formatter assembly . An unknown input device is installed. 1 Turn the power off and then on. 2 Reinstall all input trays. 3 Remove all non-HP paper-handling devices. 56.2 printer error To continue turn off then on An unknown output device is installed. 1 Turn the power off and then on. 2 Reinstall the stacker or stapler/stacker. 3 Remove all non-HP paper-handling devices. 57.X A printer fan is not functioning. Turn the printer off and then on. 358 7 Troubleshooting