HP Officejet Pro K850dn Printer - Manual (Page 87)

Poor print quality and unexpected printouts
Check the printheads and ink cartridges
Replace any clogged or worn printheads or low ink cartridges (see Maintaining the printheads ), and
try to print again.
Check the paper quality
The paper might be too moist or too rough. Make sure the media used meets HP specifications (see
Selecting print media ), and try to print again.
Check the type of media loaded in the printer
● Make sure the tray supports the type of media you have loaded. See Understanding
specifications for supported media .
● Make sure you have selected the tray in the printer driver that contains the media you want to
use. See
Changing print settings .
Check the printer location and length of USB cable
See Check the printer location and length of USB cable .
Meaningless characters print
If an interruption occurs to a job that is printing, the printer might not recognize the rest of the job.
Cancel the print job and wait for the printer to return to the ready state. If the printer does not return
to the ready state, cancel all jobs, and wait again. When the printer is ready, resend the job. If
prompted by the computer to retry the job, click Cancel.
Check cable connections
If the printer and computer are connected with a USB or parallel cable, the problem might be due to
a poor cable connection or a cable that is not in working condition.
Make sure the cable connections at both ends are secure. If the problem persists, turn off the printer,
disconnect the cable from the printer, turn on the printer without connecting the cable, and delete any
remaining jobs from the print queue. When the Power light is on and not flashing, reconnect the cable.
Check the document file
The document file might be damaged. If you can print other documents from the same application,
try printing a backup copy of your document, if available.
Check the symbol set
If you are using MS-DOS, use the HP DJCP to set the appropriate symbol set for the language of
your document. See
HP Deskjet Control Panel (HP DJCP) .
Ink is smearing
ENWW Troubleshooting 79