Philips DELLP1230, Service Manual

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8 DELL P1230 M25P
Brightness Problems Picture too dim or too bright
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Perform monitor "Reset"
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Adjust brightness & contrast controls
Geometric Distortion Screen not sized or centered correctly
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Perform monitor "Reset"
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Ensure monitor is in proper video mode
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Adjust the appropriate geometric control
Moiré (Thin Curvy Lines) Screen shows wavy or elliptical lines
Screen shows wood grain patterns
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Ensure monitor is in proper video mode
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Adjust horizontal or vertical size Clear the moiré pattern by using the OSD
"Moiré" menu in "extra controls" menu.
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Explanation of Moiré patterns .
Audible Noise Problems Has humming sound or high frequency squeal
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Ensure monitor is in proper video mode
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Reposition the monitor
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A loud hum when turning on or during manual degaussing is normal
CRT Scratched Screen has scratches or smudges
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Turn monitor off and clean the screen, see Maintenance instructions
Safety Related Issues Visible signs of smoke or sparks
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Do not perform any troubleshooting steps
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Switch off the monitor and disconnect the mains cord.
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The monitor needs to be replaced.
Intermittent Problems Monitor malfunctions on & off
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Check connection integrity of mains cables.
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Check the signal cable connection between computer and monitor.
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Ensure monitor is in proper video mode.
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Perform monitor "Reset"
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Use the monitor Self test feature described under trouble shooting.
Common problems
The following table contains general information about common monitor problems you might encounter