HP 1200 manual Error messages appear on the screen, Unable to activate Twain, Source

Error messages appear on the screen

Solution	Description
Unable to activate TWAIN	● If you are acquiring an image from another device, such
source	as a digital camera or another scanner, make sure that the
	other device is TWAIN compliant. Non-TWAIN-compliant
	devices do not work with the HP LaserJet 1220
	Print•Copy•Scan software.
	● Make sure that you have connected the USB or parallel
	cable to the correct port on the back of your computer. If
	you have another port, try attaching the cable to the other
	port. Make sure that you have an SPP-(bidirectional) or
	ECP-compliant parallel port on your computer. An SPP
	parallel port is the minimum; an ECP parallel port is
	strongly recommended. See the documentation that came
	with your computer for more information about your port.
	● Some devices might not share the parallel port with the
	printer. If you have a sound card, external hard drive, or
	network switchbox connected to the same USB or parallel
	port as the HP LaserJet 1220, the other device might be
	interfering. To connect and use the HP LaserJet 1220, you
	must disconnect the other device or you must use two
	ports on the computer. You might need to add another
	parallel interface card. Hewlett-Packard strongly
	recommends an ECP parallel interface card. See the
	documentation that came with your computer for more
	information about installing an additional parallel interface
	card or resolving device conflicts.

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