Troubleshooting | 39TroubleshootingWARNING: Before you begin any of the procedures in this section, follow theSafety Instructions.Self-TestYour monitor provides a self-test feature that allows you to check whether your monitoris functioning properly. If your monitor and computer are properly connected but themonitor screen remains dark, run the monitor self-test by performing the followingsteps:1 Turn off both your computer and the monitor.2 Unplug the video cable from the back of the computer. To ensure proper Self-Testoperation, remove all digital and the analog cables from the back of computer.3 Turn on the monitor.The floating dialog box should appear on-screen (against a black background), if themonitor cannot sense a video signal and is working correctly. While in self-test mode,the power LED remains white. Also, depending upon the selected input, one of thedialogs shown below will continuously scroll through the screen.or