Users Guide
Table Of Contents
- About your monitor
- Package contents
- Product features
- Identifying parts and controls
- Front view
- Back view
- Side view
- Bottom view
- Monitor specifications
- Resolution specifications
- Supported video modes
- Preset display modes
- Electrical specifications
- Physical characteristics
- Environmental characteristics
- Pin assignments
- Plug and play capability
- Universal Serial Bus (USB) interface
- SuperSpeed USB 5Gbps (USB 3.2 Gen1)
- USB 2.0
- USB 3.2 Gen1 (5Gbps) downstream port
- USB 2.0 downstream port
- LCD monitor quality and pixel policy
- Maintenance guidelines
- Cleaning your monitor
- Setting up the monitor
- Operating your monitor
- Power on the monitor
- Using the back panel controls
- Back panel button
- Using the On-Screen Display (OSD) menu
- Accessing the menu system
- OSD warning message
- Setting the maximum resolution
- Using the tilt, swivel, and vertical extension
- Tilt, swivel
- Vertical extension
- Rotating the monitor
- Rotate clockwise
- Rotate counterclockwise
- Adjusting the rotation display settings of your system
- Troubleshooting
- Appendix
Troubleshooting │ 57
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 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.
No U
S
B-
C
C
able
T
he display will go into
S
tandby mode in 4 minutes.
w
ww.dell.com/P
2
7
2
1
Q
or
No DP
C
able
The display will go into
S
tandby mode in 4 minutes.
w
ww.dell.com/P
2
7
2
1
Q
or
N
o HDMI
C
able
T
he display will go into
S
tandby mode in 4 minutes.
w
ww.dell.com/P2721Q