Error 51.XY, 51.10, 51.20 could be seen on these printers: HP 4240, 4250, 4350, P4014, P4014n, P3015... This error indicate that loss of beam-detect occurred.
51.10: Beam-detect error
51.20: Laser error
- Dowload the last version of the driver
- Press the "go" button.
- Switch off and on the printer.
- Reseat connectors between the laser scanner and the DC controller (J83 and J84).
- Replacer the laser scanner.
- Replace the DC controller