HP 1100A - Manual (Page 104)

104 Chapter 9 Troubleshooting the Copier/Scanner EN
Error messages appear on the screen
Unable to activate TWAIN source
● If you are acquiring an image from another device, such as a
digital camera or another scanner, make sure the other device is
TWAIN compliant. Non-TWAIN-compliant devices do not work
with the HP LaserJet 1100A Printer•Copier•Scanner software.
● Be sure that you have connected the parallel cable that came in
your package to the correct parallel port on the back of your PC. If
you have another parallel port, try attaching the parallel cable to
the other port. Make sure you have an SPP-(bi-directional) or
ECP-compliant parallel port on your computer. An SPP parallel
port is the minimum; an ECP parallel port is strongly
recommended. For more information on your parallel port, please
see the documentation that came with your PC.
● The HP LaserJet 1100A Printer•Copier•Scanner may not share a
parallel port. If you have a sound card, external hard drive, or
network switchbox connected to the same parallel port as the
HP LaserJet 1100A, the other device may interfere. You must
disconnect the other device to connect and use the
HP LaserJet 1100A or you must use two parallel ports on the PC.
You may need to add another parallel interface card. An ECP
parallel interface card is strongly recommended. Please see the
documentation that came with your PC for information on
installing an additional parallel interface card or resolving device
conflicts.