Troubleshooting; Self-Test - Dell S2421Ho User Manual

Troubleshooting

WARNING: Before you begin any of the procedures in this section, follow
the Safety instructions.

Self-test

Your 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 the monitor 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 all video cables 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, depending upon the selected input, one of the
dialogs shown below will continuously scroll through the screen.
S2421HN/S2421NX
Dell 24 Monitor
No HDMI1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2421HN
www.dell.com/support/S2421NX
Dell 24 Monitor
No HDMI2 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2421HN
www.dell.com/support/S2421NX
4. This box also appears during normal system operation if the video cable is
disconnected or damaged.
S2421HN/S2421NX
or
S2421HN/S2421NX
S2721HN/S2721NX
Dell 27 Monitor
No HDMI1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2721HN
www.dell.com/support/S2721NX
or
Dell 27 Monitor
No HDMI2 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/support/S2721HN
www.dell.com/support/S2721NX
Troubleshooting
S2721HN/S2721NX
S2721HN/S2721NX
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