- Hewlett-Packard Printer Owner's Manual

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CAUSE: Software.
SOLUTION: Use dumb terminal or a PC running a
terminal emulation program (e.g, TERM supplied
by BayTech or another program such as PC
Plus).
CAUSE: User activity.
SOLUTION: Wait until current activity between PC and
printer is completed. There should be no red
LEDs illuminated when trying to configure.
CAUSE: Bad PC COM port.
SOLUTION: Try a different COM port or PC.
CAUSE: PC serial card uses incorrect interrupt. The
TERM program requires that COM1 use IRQ4
and that COM2 use IRQ3
SOLUTION: Reconfigure serial card, use different
serial card or different terminal emulation
program.
PROBLEM: CANNOT SELECT PRINTER
CAUSE: Port selection.
SOLUTION: Printer Select Code may be sent out on
wrong port (e.g. Printer Select Code is going out
COM1 and Print Master is connected to COM2).
Also make sure selected port is designated as a
printer port and not as a computer port.
CAUSE: Improper Printer Select Code.
SOLUTION: Match Printer Select Code you are
sending to Printer Select Code specified in
configuration mode. Check case of Printer Select
Code (upper or lower). Also, remove any spaces
between Printer Select Code and port number.