HP LaserJet Error Codes 20 – 49
20 – Memory Overflow
21 – Print Overrun
22 – EIO X Buffer Overflow
23 – EIO X Timeout
24 – EIO 2Fh
25 – EIO 3Fh
26 – Data Transfer Error
27 – Non-HP Memory Card
28 – Illegal Cartridge
29 – Device Not Configured
30 – No HP Memory Card
31 – Bad Serial Interface
32 – Bad Connector
33 – Bad Power Supply
34 – Bad Engine Board
35 – Bad EEPROM
36 – Bad Firmware
37 – Bad Formatter
38 – Bad Motor
39 – Bad Duplex
40 – Bad Serial Number
41 – Bad Serial Port
42 – Bad Fuser
43 – Bad Maintenance Kit
44 – Bad Tray
45 – Bad Toner Cartridge
46 – Bad Paper Tray
47 – Bad Duplex Unit
48 – Bad printhead
49 – Bad EIO Card
