Troubleshooting Video Adapters Problems
If you experience video problems, first check the obvious things—that the display has power and is connected properly to the adapter, that no one has changed settings for the adapter or display, and so on. Boot the system in Safe Mode (press F8 during boot to display the Windows boot menu) to load the vanilla Windows display drivers and verify that the adapter and display are functioning properly. If you have another display handy, try connecting it to the problem system to eliminate the display as a possible cause.
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