Philips 202P4 Service Manual page 115

Color Purity
Turn on monitor with a full image
for 30 minutes (due to drift).
Color Purity or Blotchy or Streaky
YES
Press Degauss button (or via the OSD manipulation)
or Turn unit "OFF" then "ON" to degauss.
Does degaussing resolve ?
YES
END
General Troubleshooting Guide
15
NO
Note the location of "problem
area" (Color impurity)
Observe the "problem area"
while turning the monitor 90
degrees left of center and
right of center.
Does the "problem area"
move on the screen as you
are turning the monitor ?
YES
Environment related ?
YES
Check for magnetic interference
and try to remove.
Try moving the monitor to see if
problem goes away.
Is picture displayed
normally?
YES
END
NO
NO
It is need to check and
repair the monitor.
202P4 M25P
9
Go to cover page
NO
Monitor related ?
Power off any monitor that
is within 2 or 3 feet away.
Remove any unshielded
speakers away from the
monitor.
Make sure there are no
flourescent light fixtures
close to the monitor.
Try to keep monitor
away from large metal
structures, power poles,
fans and metal carts.
Check for other devices
that may be causing
magnetic interference.
Is picture displayed
normally?
YES
END
107