Dell ST2420L User Manual

Also see for ST2420L: Specifications Setup guide Setting Up Your Monitor Setting Up Your Monitor

Dell ST2420L User Manual Manual pdf 29 page image

Back to Contents PageSolving ProblemsDell™ ST2420L/ST2421L monitor User's GuideSelf-TestBuilt-in DiagnosticsCommon ProblemsProduct-Specific ProblemsTroubleshooting the Dell™ Soundbar (Optional)CAUTION: Before you begin any of the procedures in this section, follow the Safety Instructions.Self-TestYour monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but themonitor screen remains dark, run the monitor self-test by performing the following steps:1. Turn off both your computer and the monitor.2. Unplug the video cable from the back of the computer. To ensure proper Self-Test operation, remove the Analog (blue connector) cable from the back of computer.3. Turn on the monitor.The floating dialog box should appear on-screen (against a black background) if the monitor cannot sense a video signal and is working correctly. While in self-test mode,the power LED remains white. Also, the dialog shown below will continuously scroll through the screen.or4. This box also appears during normal system operation, if the video cable becomes disconnected or damaged. The monitor will enter Power Save Mode after 15 minutes ifleft at this state.5. Turn off your monitor and reconnect the video cable; then turn on both your computer and the monitor.If your monitor screen remains blank after you have performed Step 5, check your video controller and computer system.Built-in Diagnostics