Troubleshooting; Self-Test - Dell C8621QT User Manual

Troubleshooting

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

Self-Test

Your display provides a self-test feature that allows you to check whether your display is
functioning properly. If your display and computer are properly connected but the display screen
remains dark, run the display self-test by performing the following steps:
1. Turn off both your computer and the display.
2. Unplug the video cable from the back of the computer. To ensure proper Self-Test
operation, remove all digital and the analog cables from the back of computer.
3. Turn on the display.
The floating dialog box should appear on-screen (against a black background), if the display
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.
56 | Troubleshooting
Dell 86 Monitor
No HDMI 1 Cable
The display will go into Power Save Mode in 4 minutes.
www.dell.com/C8621QT
Dell 86 Monitor
No HDMI 2 Cable
The display will go into Power Save Mode in 4 minutes.
www.dell.com/C8621QT
or
C8621QT
C8621QT