HP LaserJet 3150 All-in-One Printer series - Manual (Page 198)

196 8 Troubleshooting and Maintenance EN
Solving scanning problems
Use the following table to solve problems with quality of scans. See
also “Solving image quality problems” on page 201 and “Solving
paper feed problems” on page 209.
Problem Cause Solution
The message on
the computer
screen says there
was a problem
opening scanner.
Unable to activate
TWAIN source. The computer parallel port may not
adequately support bidirectional
communication.
Another device such as an external drive
or switchbox may be interfering.
The wrong TWAIN source is selected
within the program.
Another driver or status window may be
loading from previously installed devices
such as scanners, software you installed,
or software that came with the computer.
Ensure that the computer has a parallel
port with a bidirectional data bus. (EPP or
unidirectional ports are not supported.)
Change the parallel port mode setting in
the computer’s BIOS. HP recommends
setting it to ECP or bidirectional, but other
modes may also work. For instructions on
changing the setting, see Appendix C, see
the computer documentation, or contact
the computer manufacturer.
If there is another device connected to the
computer parallel port, disconnect it and
connect the HP LaserJet 3150 product
directly to the computer parallel port. You
might also have to remove software for the
other device before the product will work.
Or, use a second parallel port on the
computer.
Verify the correct TWAIN source is
selected. In the JetSuite Pro software,
check the TWAIN source by clicking
Select Source from the File menu.
Check the Load= and Run= lines in the
WIN.INI file. Place a semicolon in front of
each line to remark them out: ;load=xxxx
and ;run=xxxx. If you need further
assistance, contact the computer
manufacturer.
Check the [386enh] section of the
SYSTEM.INI file for device conflicts. If you
need further assistance, contact the
computer manufacturer.
No parallel port is
available or the
parallel port is
being shared by
another device. The HP LaserJet 3150 product must be
directly connected to the computer’s
parallel port. It cannot share the parallel
port with another device. If you have a device such as an external
disk drive or switch box connected to the
parallel port and want to continue using it,
you must get two parallel ports on your
computer.