Table 3 -4 (Cont.) Identifying and correcting problems
Symptom
Possible Cause
Video display has
There is
moving dots and
electromagnetic
distorted lines.
interference.
The display rolls
or flickers.
Refresh rate is
too low.
The terminal is
faulty.
The printer will
The printer
not print.
power is not on.
The printer
cables are not
connected.
Communication
port is not set
correctly.
If you have a
serial pri nter, its
speed may be
set incorrectly.
Accessibility aid
Modifier keys
remain in effect
enabled.
after released.
Troubleshooting
Suggestion Solution
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.
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.
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.
3-3