User guide

Matrox DualHead2Go – User Guide 31
2
Cause There may be unsupported graphics hardware in your computer.
1
Solution Make sure your Matrox product supports your graphics hardware by running the GXM
System Compatibility Tool.
For the latest compatibility information, see the Matrox Web site
(www.matrox.com/graphics/en/support/gxm_main
).
2
Solution If graphics hardware is built into your computer motherboard, it may not be enabled. Check
your system manual for instructions on how to enable your computer’s built-in graphics
hardware.
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 An unsupported display mode may have been selected.
1
Solution If one of your displays is usable, use Matrox PowerDesk to change your display mode. For
more information, see Matrox PowerDesk help.
2
Solution If all your displays are unusable, change your display resolution in Windows.
1 Restart your computer in VGA mode.
a Windows 8 – Click Settings Æ Power , then select Restart to restart your computer.
Windows 7 – Click Start , point to the arrow ( ), then select Restart to restart
your computer.
Windows Vista/XP – Click Start Æ Shut Down * Æ Restart Æ OK * to restart your
computer.
(* Depending on your version and configuration of Windows, this part of the step
may not be necessary.)
If your primary monitor is unusable, see your system manual for information on
how to restart your computer using a hardware control.
b Before Windows starts, press [F8] for the Windows startup menu to appear. (If [F8]
doesn’t work, instead try pressing and holding [Ctrl] before Windows starts.)
c Select “VGA mode” (or “Low resolution video”), then press [Enter].
2 Change your display resolution:
Windows 8/7 –
a Right-click your Windows desktop background, then click Screen resolution .
Note: If your system stops responding while it’s in VGA mode, select “Safe mode”
instead.