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58 hp photosmart 720 user’s manual
Unknown USB
device
The connected
USB device is not
a printer.
Disconnect the current USB
connection and connect to
your printer.
Unsupported
printer
The printer is an
unsupported
device.
Disconnect the USB cable,
and connect to a
supported printer, such as
HP Photosmart or HP
Deskjet.
Unable to
communicate with
printer
The printer has a
problem.
Check the printer.
Disengage photo
tray
The selected
paper size
cannot be used
with the printer
photo tray
Disengage the printer
photo tray, or change the
paper size.
Printer top cover
is open
The printer is
open.
Close the top cover of the
printer.
Incorrect or
missing print
cartridge
The printer
cartridge is the
incorrect model
or is missing.
Install a new printer
cartridge, turn the printer
off, then turn it back on.
Printer has a
paper jam.
There is a paper
jam or the
printer carriage
has stalled.
Turn off the printer. Clear
the paper jam, and then
turn on the printer.
Message Possible cause Solution