Technical data

Maintenance 4–3
Table 4–1 (Cont.) Identifying and Correcting Problems
Symptom Possible Cause Suggested Solution
Raster can
be seen using
the brightness
control, but
no video or
cursor can be
seen using the
contrast control.
Signal cables are
disconnected to
the monitor or
the host system.
Refer to Chapter 2 of this manual
and the host system documentation to
reconnect the signal cables.
Monitor or host
system is faulty.
Turn the monitor power switch off.
Contact Customer Services.
Erratic or
moving
colors on the
screen. Screen
display may
be distorted,
flickering, or
rolling. Green
color may be
missing.
Electromagnetic
interference is
coming from
other appliances.
Press Degauss switch. If color
problems cannot be corrected, then
electromagnetic interference exists.
Therefore, move any electromechanical
device, such as a fan, a motor, or an
electric pencil sharpener, away from
the monitor or move the monitor.
(CAUTION: Before moving the monitor, turn the monitor off
and wait 20 seconds to let static electricity dissipate.)
Green signal
cable has a loose
connection or is
not connected to
the monitor or
the host system.
Refer to Chapter 2 of this manual
and the host system documentation to
reconnect the cable.
Wrong variation
(66 or 72 Hz) of
the monitor for
the system.
Contact Customer Services to check
your monitor and change the variation
if needed.
Monitor or host
system is faulty.
Turn the monitor power switch off.
Contact Customer Services.