HP Deskjet 9300 Printer series - Manual (Page 30)

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Make sure you only load one type of paper at a time.
Check that there is sufficient paper in the tray.
If none of the above solutions worked, print a diagnostic page.
See
“Printing a diagnostic page” for instructions.
Paper skew problem
If paper is twisting as it feeds or margins appear crooked, make sure both the bottom and side
paper guides are gently pressed against the paper.
Paper is jammed in the printer
Tips for avoiding paper jams
Make sure nothing blocks the paper path.
Do not use media that is damaged, curled, or wrinkled. It is recommended not to use
paper with cutouts or perforations or paper that is heavily textured or embossed.
Load only one paper type at a time into any of the trays.
Except when using manual feed, load the paper print-side down with the right edge of the
paper aligned against the right edge of the tray.
Do not load more than 150 sheets (or 19 mm-height stack) of paper or 15 envelopes into
the main tray at one time. Load only one sheet of paper into the manual feed tray.
Always use paper that conforms with those listed in “Printer specifications.” For
information on recommended media, see “Printing and loading media.”
A blank page is ejected
Check that the protective tape is removed from the ink nozzles on the print cartridges.
Check for an empty print cartridge.
If you are printing black text and a blank page prints, your black print cartridge might be
empty. Check the printer LEDs to make sure they are not on (see
“Printer lights blink” and
“Print cartridge problem” for more information). Replace the empty black print cartridge
and try to print again. See “Replacing the print cartridges” for instructions.
Check the printer setup.
Make sure your printer is selected as the current or default printer.
To clear the printer of any jammed paper, open the access cover and pull the paper towards
you. If you cannot reach the jammed paper, turn the panel knob at the back of the printer,
remove the panel, pull out the jammed paper, and replace the panel. If you still cannot reach
the paper, lift up the output tray, and remove the jammed paper from the main paper tray.