CPD-E250 - Sony Monitor Service Manual (repair manual). Page 44

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CPD-E250 CPD-E450
4-089-640-11
Color is not uniform
• Degauss the monitor.* If you place equipment that generates a 
magnetic field, such as a speaker, near the monitor, or if you change 
the direction the monitor faces, color may lose uniformity.
White does not look white
• Adjust the color temperature.
Monitor buttons do not operate (
 appears on the 
screen)
• If the control lock is set to ON, set it to OFF.
Letters and lines show red or blue shadows at the 
edges
• Adjust the convergence.
A hum is heard right after the power is turned on
• This is the sound of the auto-degauss cycle. When the power is 
turned on, the monitor is automatically degaussed for five seconds.
* If a second degauss cycle is needed, allow a minimum interval of 
20 minutes for the best result. A humming noise may be heard, but this is 
not a malfunction.
On-screen messages
If “OUT OF SCAN RANGE” appears:
This indicates that the input signal is not supported by the monitor’s 
specifications. Refer to the following remedy:
• Check that the video frequency range is within that specified for 
the monitor. If you replaced an old monitor with this monitor, 
reconnect the old monitor and adjust the frequency range to the 
following:
Horizontal: 30 – 96 kHz; Vertical: 48 – 170 Hz
If “NO INPUT SIGNAL” appears:
This indicates that no input signal is present. Refer to the following 
remedies.
• Check that the video signal cable is properly connected and all 
plugs are firmly seated in their sockets.
• Check that the HD15 video input connector’s pins are not bent or 
pushed in.
• Check that the computer’s power is “on.”
• Check that the graphic board is completely seated in the proper 
bus slot.
If “MONITOR IS IN POWER SAVE MODE” 
appears:
This indicates that the computer is in power saving mode. This 
message is displayed only when your computer is in a power saving 
mode and you press any one of the buttons on the monitor. Refer to 
the following remedies.
Try pressing any key on the computer keyboard or moving the 
mouse.
• Check that the computer’s power is “on.”
• Check that the graphic board is completely seated in the proper 
bus slot.
To display this monitor’s name, serial number, and 
date of manufacture.
While the monitor is receiving a video signal, press and hold the 
center of the MENU / OK button for more than five seconds to 
display this monitor’s information box.
INFORMATION
OUT  OF  SCAN  RANGE
MODE L : CPD - E 2 5 0
SER NO : 1 2 3 4 5 6 7
MANUF ACTURED : 2 0 0
I NFORMA T I ON
2 - 0 1
MODE L : CPD - E 4 5 0
SER NO : 1 2 3 4 5 6 7
MANUF ACTURED : 2 0 0 2 - 0 1
I NFORMA T I ON
01GB03BAS-AEP.fm  Page 7  Tuesday, May 14, 2002  4:02 PM
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