HP Deskjet 320 Solutions Guide - Page 154

Table 6-9. Possible Causes for Short Print Cartridge Life - Black or Color (Continued) Possible Cause Explanation The print cartridge packaging seal was broken too soon The print cartridge has a longer life sealed in its packaging rather than in the printer. Keep print cartridges sealed in their packaging until needed. Then, install the print cartridge in the printer promptly. If you use both a black and a color print cartridge, keep one print cartridge in the printer and the other in the storage container provided with the optional Color Kit1. The estimate of the number of pages actually printed was inaccurate Underestimating the number of pages actually printed is hard to avoid. When counting pages per cartridge, be sure to count drafts that have been thrown away. The print cartridge was faulty If a print cartridge proves to be faulty, replace it. If a pattern of faulty print cartridges develops, it is possible that a problem in the printer itself may be causing the print cartridges to fail. In this case, return the printer with the failed print cartridges for evaluation and repair. There may be a printer hardware problem The service station may be faulty, or the printer may be damaging the print cartridges. Return the printer with the failed print cartridges for repair. The print cartridge cleaning routine was used excessively The cleaning routine clears the ink nozzles and - if used in the appropriate circumstances - can have the effect of restoring a print cartridge. However, using this routine too frequently consumes significant quantities of ink. Avoid overusing the cleaning routine. 1. The HP DeskJet Portable prints black only; the Color Kit is available for the HP DeskJet 310, 320 and 340 only. 6-30 Problem Resolution