Instruction manual

Troubleshooting 3-3
Table 3-1 (Cont.) Identifying and correcting problems
Symptom Possible Cause Suggestion Solution
Video display has
moving dots and
distorted lines.
The display rolls
or flickers.
There is
electromagnetic
interference.
Refresh rate is
too low.
The terminal is
faulty.
Move and electromechanical device,
such as a fan or a motor, away form the
terminal or move the terminal.
CAUTION: Before moving the system, turn
the power off and wait 20 seconds to let
the static electricity dissipate.
From the Display menu item, choose
Refresh rate and select 72 Hz.
Set the power switch to the off position
and contact the service representative.
The printer will not
print.
The printer
power is not on.
The printer
cables are not
connected.
Communication
port is not set
correctly.
If you have a
serial printer, its
speed may be
set incorrectly.
Turn on the power to the printer.
Check the cables.
From the Communication menu item,
choose Port select and match the
setting to the connections on the
terminal.
From the Printer menu item, choose
Serial print speed and match the setting
to the one in your printer manual.
Modifier keys
remain in effect
after released.
Accessibility aid
enabled.
Check keyboard indicator line for icon.
This feature is enabled by pressing any
key modifier key five times. To disable,
press and hold a modifier key and then
press another key.