NEC XP21 - MultiSync - 21" CRT Display User Manual page 33

E-28
Problem,
Picture bounces or a
waving pattern is present
in the picture.
Edges of the display
image are not square.
Display image is not
centred, is too small, or
too large.
Picture has a green tint
or the background
brightness cannot be
turned down.
Colour looks blotchy.
Colour is incorrect or
background brightness is
too high and cannot be
decreased.
No green color (if using
BNC connection)
Check these items
Move electrical devices that may be causing
electrical interference away from the monitor.
Use the OSM Basic and Advanced Geomatry
Controls to straighten the edges. If possible
position the monitor east.
Adjust Size and Position Controls to adjust the
image in the OSM.
Check the Sync Switch is in the proper position.
Disconnect the C/S input of the BNC cable if you
are using the BNC inputs.
Press the Degauss Button once. Do not hold down
the button down continuously.
The Sync Switch should be in the correct
position. OFF position: When using a Macintosh
II, Quadra, or compatible (and not a Macintosh
LC) with both the Sync on green signal. ON
position: When using computers or video cards
with separate Sync (VGA, SVGA, 8514/A, XGA)
equipped with a 15-pin mini D-sub connector for
the monitor input and composite Sync signals, or
a Macintosh LC, AV's, PowerBooks, Power
Macs or Quadra 605.
Check the BNC cables for propper connection (G
and CS connection may be reversed).
Trouble Shooting