User guide
Matrox Marvel – User Guide 27
3
Cause
If your monitor uses BNC input, one or more connection settings may be incorrect.
1
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.
4
Cause
If display problems occur after the startup screen of your operating system, your software
monitor settings may be incorrect.
1
Solution
Make sure correct software monitor settings are selected.
If your display is still usable, see “Monitor setup”, page 21. Otherwise, see the next
troubleshooting item.
Problem After the startup screen, or after display settings are changed,
the screen image is garbled or unusable
(blank screen, rolling or overlapping screen images)
1
Cause
The Matrox 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.
1
Solution
Windows 95/98 –
1
Press [Ctrl]+[Alt]+[Del] twice to restart your computer.
2
Before
Windows starts, press [F8] for the Windows startup menu to appear. (With
Windows 98, if [F8] doesn’t work, instead try pressing and holding [Ctrl] before
Windows starts.)
3
Select the number for “safe mode”, then press [Enter].
4
Right-click the Windows desktop background, then click
Properties
Æ
Settings
.
5
Move the
Desktop area
(Windows 95) or
Screen area
(Windows 98) slider down to its
lowest setting, then click
OK
.
6
Restart your computer normally.
7
Make sure the correct monitor is selected in Windows (see “Monitor setup”, page 21).
8
Make sure you’re not using inappropriate monitor setting customizations: Access the
PowerDesk
Monitor Settings
property sheet (see “Accessing PowerDesk property
sheets”, page 21), then click
Delete all customizations
.
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WAR NIN G:
If incorrect software monitor settings are applied,
some
monitors can be
permanently damaged. For more information, see your monitor manual.
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