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27
7 TROUBLESHOOTING
• The CRT is not warmed up. Allow 30 minutes for
the monitor to stabilize.
• Allow 30 minutes for the monitor to warm up.
• Degauss the screen. (Use the degaussing feature in
the ScreenManager’s 'Others' menu. See page 22.)
• The monitor emits a humming noise when
executing automatic degaussing at power-ON.
This is not a problem.
• The monitor beeps at any time. This is not a
problem. See page 23 for full details.
• The Adjustment Lock is probably on. To unlock:
switch off the monitor power, then hold down the
AUTO-SIZING button and switch the monitor
back on. See page 25.
• The Adjustment Lock is probably on. To unlock:
switch off the monitor power, then hold down the
AUTO-SIZING button and switch the monitor
back on. See page 25.
Color problems
1) The entire screen appears
bluish or reddish.
2) Color purity is not uniform.
Others
1) The monitor beeps or hums.
2) Control Pad “ENTER key”
does not operate.
3) AUTO-SIZING button does
not operate.
Explanation of the Characteristics of CRTs
When the monitor is not fully warmed up, the screen may look slightly colored, e.g.
reddish or bluish. This phenomenon is due to the unstableness of the electron gun
during its warm-up period. Please wait for about 30 minutes until the monitor
stabilizes in order to gain its proper color.