HP 400 - Manual (Page 108)

Service and Support Information 6-11
Performance Problems
Intermitten operation Powers OFF and ON intermittently EZ40
Print mechanism locks up Printer locks up while printing EZ45
Stops printing Prints part of page then stops EZ50
Burning smell During operations, printer emits a burning smell EZ55
Smoking smell During operations, printer emits a cigarette smell EZ60
Undefined Code and Miscellaneous
Undefined code None of the above codes apply ZZ00
Table 6-3. HP DeskJet 400 Printer Error Code Table (Continued)
Keyword Description Code