There is likely nothing wrong with your display. Thats a very low end celeron, and XGA (1024x768) is likely the native resolution (and the highest, LCDs will not run higher than native, only native or ...
First of all, we need to ensure that the connection between the graphics card (external) and your laptop is tight. If the connection is loose, your screen may flicker intermittently. If you can open ...
Is the bottom half of the screen black on your Windows laptop? If yes, you can use the fixes provided in this article to resolve the issue. Several users experienced this problem with their laptop ...