One way to tell if your monitor is broken is to look for an On-Screen Display. The feature can be triggered by pressing the buttons on the monitor, however, if the OSD is locked, it will show a white padlock on a black background or a white padlock on a blue background. No matter which background appears below the white padlock on the Dell monitor, the lock or unlock Dell monitors tips will be helpful to you.
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About The Author: Stephan Pringle is an Information Technology Specialist. He covers hardware and software and provides tips for you to troubleshoot and repair issues on your own. In his spare time, he writes articles about the State of New York on his Hackintosh and HackBook and that has helped him to become the top contributor of the New York City section of Yahoo! Answers.