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18
Troubleshooting
Before contacting technical support, refer to this section.
If thin lines appear on your screen
(damper wires)
The visible lines on your screen especially when the background
screen color is light (usually white), are normal for the Trinitron
monitor. This is not a malfunction. These are shadows from the
damper wires used to stabilize the aperture grille. The aperture
grille is the essential element that makes a Trinitron picture tube
unique by allowing more light to reach the screen, resulting in a
brighter, more detailed picture.
On-screen messages
If there is something wrong with the input signal, one of the
following messages appears on the screen.
If NO SIGNAL appears on section 1
This indicates that no signal is input from the selected connector.
If OUT OF SCAN RANGE appears on line 1
This indicates that the input signal is not supported by the
monitor’s specifications.
For more information, see “Trouble symptoms and remedies” on
page 19.
Displaying this monitor’s name, serial number,
and date of manufacture.
While the monitor is receiving a video signal, press and hold the
MENU button for more than 5 seconds to display this monitor’s
information box.
If the problem persists, call your authorized Sony dealer and give
the following information.
• Model name: CPD-G420S
• Serial number
• Name and specifications of your computer and graphics board.
2 The selected connector
This message shows the currently selected connector
(INPUT 1 or INPUT 2).
3 The remedies
The following messages appear on the screen.
• If ACTIVATE BY COMPUTER appears on the screen, try
pressing any key on the computer or moving the mouse, and
confirm that your computer’s graphics board is completely
seated in the correct bus slot.
• If CHECK SIGNAL CABLE appears on the screen, check
that the monitor is correctly connected to the computer
(page 6).
• If CHECK INPUT SELECTOR appears on the screen, try
changing the input signal (page 8).
Damper wires
IIONNFORMAT
MON I I I NGS WORKTOR
I
I VATE
2:NO
BY
S
COMPUTER
W
R
G
B
GNALI
S GNAL CABLEI
NPUT
I NPUT SELECTOR
ACT
CHECK
CHECK
2 The selected connector and the frequencies of the
current input signal
This message shows the currently selected connector
(INPUT 1 or INPUT 2). If the monitor recognizes the
frequencies of the current input signal, the horizontal and
vertical frequencies are also displayed.
3 The remedies
CHANGE SIGNAL TIMING appears on the screen. If you
are replacing an old monitor with this monitor, reconnect the
old monitor. Then adjust the computer’s graphics board so
that the horizontal frequency is between 30 – 110 kHz, and the
vertical frequency is between 48 – 170 Hz.
W
R
G
B
IIONNFORMAT
MON I I I NGS WORKTOR
I1:.200 0 /kHz 85Hz
RANGE
S GNAL TIIINGM
NPUT
OUT OF SCAN
CHANGE
W
R
G
B
SER NO
:
1234567
MODEL
:
CPD G420S
MANUFACTURED
: 2000-52
INFORMATION
MENU
Example
b