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Have refurbished Dell Optiplex gx280. Plugged Dynex VGA display cable in & got nothing. Still only seeing the Dell Digital Input Self Test Feature Check bounce around the screen, as if the computer is not communicating with the monitor. Tried plugging the cable into Toshiba laptop & still no communication to Dell monitor. Suggestions?

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Hi!

If you are able to use a known good monitor with Dell Optiplex GX280, obviously the problem is with the monitor. If you only have one monitor, try to reseat the cable from the monitor going to the blue port if its analog (white port if its digital). if it does the same thing tried to open the chassis then reseat the video card (check this site for the instruction for the manual, http://support.dell.com/support/edocs/systems/opgx280/en/ug/index.htm)
if you still dont get anything on the screen, most likely the problem would be the video card.

If you tried to connect the monitor to a laptop make sure to toggle it using FN and F8. Toggle it three times and observe if you'll be able to see display either on one screen or both. if you're able to see something on the laptop and nothing on the monitor then its a problem with the monitor.

Hope this helps!

Posted on May 19, 2011

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