ATI Technologies X1550 SERIES manual Screen Defects

104 Troubleshooting

General Troubleshooting

Problem	Possible Solution
No Display	• Check that the card is seated properly in its expansion
	slot.
	• Ensure that the monitor cable is securely fastened to
	the card.
	• Make sure that the monitor and computer are plugged
	in and receiving power.
	• If necessary, disable any built-in graphics capabilities
	on your mother board. For more information, consult
	your computer’s manual or manufacturer. (Note: some
	manufacturers do not allow the built-in graphics to be
	disabled or to become the secondary display.)
	• Make sure that you selected the appropriate monitor
	when you installed your enhanced driver.
Screen Defects	• Check if your monitor supports the resolution,
Appear	horizontal (kHz) and vertical (Hz) refresh rates as
	required by the graphics card.
	• Check your current resolution, refresh rate, and color
	depth settings in the Settings and Monitor tabs in your
	Display Properties dialog.
	Warning! Ensure that both video card and monitor
	support resolution and refresh rates you select.
	Incompatible resolution/refresh rate selection may result in
	monitor damage. Refer to your monitor's documentation
	for recommended resolutions and refresh rates.
Off-Center	• Try adjusting the brightness, sharpness, contrast, and
Screen Image,	color balance controls of your monitor.
Odd Colors or No	• Try adjusting the centering and positioning controls of
Picture	your monitor to position the picture on the screen
	• Set the monitor's RGB inputs (and sync switches, if this
	option is available) to 75 Ohms, with the sync set to
	external.
	• Digital Flat Panel (DFP) monitor users: refer to your
	monitor's documentation for the appropriate cable and
	connector to plug into the DVI-I connector on the
	graphics card.
Operating	• Check the driver installation and make sure that all
System Warns	software is correctly loaded corresponding to your
that Video Card	operating system and applications.
Isn’t Properly	• Re-install the ATI drivers for your Radeon® X1550
Configured	Series card.