Installation guide

Matrox Graphics Card – Installation Guide 23
 Solution – If your monitor uses BNC input (see picture below), make sure the Red, Green,
Blue, Horizontal Sync (HSYNC – white or gray wire), and Vertical Sync (VSYNC – black
wire) connections are firmly in place and plugged into the correct input.
 Cause – If your monitor uses BNC input
(see picture), one or more connection settings may be
incorrect.
 Solution – Set each of your monitor’s RGB input
and sync switches (if available) to 75 ohms, with
the sync set to “external”. These controls are
usually switches on the back of your monitor.
Problem: After the startup screen, or after display settings are changed,
the screen image is garbled or unusable
(rolling screen images, overlapping screen images or a blank screen)
 Cause – The MGA display driver may be trying to use settings your monitor doesn’t support.
This can happen if a monitor was never selected in the software and the display resolution was
changed to one your monitor doesn’t support, or if the monitor connected to your computer was
changed without it being changed in the software.
 Solution – Windows 95:
1 Press [Ctrl]+[Alt]+[Del] twice to restart your computer.
2 When you see “
Starting Windows 95...
”, press [F5] to enter “
safe mode
”.
After startup, MGA software detects that MGA display drivers are not active and prompts
you as to whether you want to have MGA software disabled; click
No
.
3 Select your monitor with the Windows 95 monitor selection method.
For more information, see the MGA PowerDesk online guide.
4 Restart your computer.
 Solution – Windows NT 4.0:
1 Press [Ctrl]+[Alt]+[Del]  [Tab]  [Tab]  [Enter]  [] (down arrow)  [Enter] to restart
your computer.
2 From the startup menu, choose a Windows NT 4.0 “
VGA mode
”.
After startup, MGA software prompts you that MGA display drivers are not active; click
OK
to continue.
WA R NI N G : If incorrect software monitor settings are applied, some monitors can be
permanently damaged. For more information, see your monitor manual.
Bayonet Nut Connect (BNC)