HP 3900 series - Manual (Page 61)

"Print cartridge is in the wrong slot"
If you receive this error message, the print cartridge is installed in the wrong side of
the print cartridge cradle.
Always install the tri-color print cartridge in the left print cartridge cradle compartment.
Install the black print cartridge in the right print cartridge cradle compartment.
"Printing in ink-backup mode"
When the printer detects that only one print cartridge is installed, ink-backup mode is
initiated. This printing mode lets you print with a single print cartridge, but it slows the
printer and affects the quality of printouts.
If you receive the ink-backup mode message and two print cartridges are installed in
the printer, verify that the protective piece of plastic tape has been removed from each
print cartridge. When plastic tape covers the print cartridge contacts, the printer
cannot detect that the print cartridge is installed.
Out of paper message
Follow the appropriate steps for the condition that exists.
If the paper tray is loaded
1.
Verify the following:
–
A sufficient amount of paper is loaded in the paper tray (at least ten sheets).
– The paper tray is not overly full.
– The paper stack is touching the back of the paper tray.
2. Slide the paper guide so that it fits firmly against the edge of the paper.
3. Click Continue to resume printing.
If the paper tray is empty
1.
Load paper in the paper tray.
2. Push the paper forward until it stops.
3. Slide the paper guide so that it fits firmly against the edge of the paper.
4. Click Continue to resume printing.
User's guide 59