Question about Dell Latitude C840 Notebook

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Display on Dell C840 has blackborders at low resolution

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That should be normal. If you use a resolution that is lower then the physical device it will leave the edges black. If the screen printing is to small change fonts and icon sizes instead.

Posted on Sep 03, 2009

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This is not a GPO issue. The problem is that all Windows will attempt to set the new resolution and a fail-safe is that if you do not click the Keep Changes button after thirty seconds it switches back to the old settings. This ensures that if you set the resolution to a range the monitor or display adapter can't handle that you don't get 'stuck' with a blank screen.
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Laptops when running in non native resolutions sometimes tend to use a small area, so that the bluring of text is not noticeable. The reason is that laptop text is only sharp in its native resolution, and in your case the possibility is that your native resolution is 1600x1200 (If you can post the exact model or a link with your machine configuration, I can confirm what the native resolution is).

However you can make the icons and text larger, the best way is to and change the font size in windows (display settings) from the normal to large or extra large. This makes all the fonts much larger and easy on the eye, and it also will keep the text large as you are still running it in native solution mode.

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The type of screen you have is a UXGA screen. the optimal resolution for that is 1600 x 1200. changing the resolution for that will distort the screen causing black borders. If a computer has a 15.0+" SXGA+ screen with an optimized resolution of 1400x1050 and the screen's current resolution is set to 1280x1024 pixels, the display will shrink resulting in a black border surrounding the edges of the screen. Also, all other lower resolutions may be stretched to fit the screen. No border will be visible, but fonts may appear slightly fuzzy.

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