Troubleshooting - ATEN US221A User Manual

Troubleshooting

First, make sure that all cables are securely attached and seated
completely in their sockets.
Problem
Unit operates
erratically
Printer does not
appear in
configuration
utility.
Monitor program
of a printer does
not respond / Print
error messages
are generated
The Lock / Unlock
function does not
respond
Auto Switch print
function does not
respond.
Auto Switch
function for other
devices does not
release control
after application
closes.
Possible Cause
Static electricity may
cause the unit to
operate erratically.
Printer was not
installed correctly.
The printer's USB port
is configured for a PC;
the US221A / US421A
is in Auto Switch
mode.
The too rapid or
continuous
connecting /
disconnecting of a
USB connector from a
locked port can cause
the status of the lock
to be misread.
OS printer settings not
sent / not set correctly.
OS failed to close the
application.
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Action
Disconnect the
appropriate USB cable
from the US221A /
US421A port, then
reconnect it.
Re-install the printer; the
configuration utility will
now find the printer.
Disable the Auto Switch
function and operate the
US221A / US421A
manually.
Disconnect all USB cables
from the US221A /
US421A, then reconnect
them.
Reboot your PC to re-
establish settings, or re-
install the Configuration
Utility. See Software
Operation, page 14.
Manual close the
application in your OS.