HP Deskjet 450 Mobile Printer series - Manual (Page 76)

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Right print cartridge LED on. Black or photo print cartridge is low on ink.
Replace the print cartridge. See Replacing the print
cartridges .
Right and Left print cartridge LEDs on. Tri-color and black or photo print cartridges are low on ink.
Replace the print cartridges. See Replacing the print
cartridges .
Power LED off, Resume LED blinks. Media jam or paper motor stall.
Clear the jammed paper. See Print media is jammed .
After clearing the jam, press the R ESUME BUTTON to
continue the print job.
If no paper jam exists, press the R ESUME BUTTON . If this
does not work, try turning the printer off and then on
again, and resend the print job.
Power LED blinks, Resume LED blinks. Media jam or carriage stall.
Clear the jammed paper. See Print media is jammed .
After clearing the jam, press the R ESUME BUTTON to
continue the print job.
If no paper jam exists, press the R ESUME BUTTON . If this
does not work, try turning the printer off and then on
again, and resend the print job.
Power LED blinks, Resume LED blinks,
Left and Right print cartridge LEDs on. Media jam or service station stall.
Clear the jammed paper. See Print media is jammed .
After clearing the jam, press the R ESUME BUTTON to
continue the print job.
If no paper jam exists, press the R ESUME BUTTON . If this
does not work, try turning the printer off and then on
again, and resend the print job.
Power LED turns on twice as long
as off. Print job is being canceled.
No action required.