Dell C7520QT User Manual

Troubleshooting | 57
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 o 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.
Dell 75 Monitor
No HDMI 1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/C7520QT
C7520QT
or
Dell 75 Monitor
No HDMI 2 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/C7520QT
C7520QT

Dell C7520QT Specifications

General

Color gamut	72 %
Pixel pitch	0.429 x 0.429 mm
Aspect ratio	16:9
Screen shape	Flat
Response time	8 ms
Backlight type	LED
Display diagonal	74.5 \
Surface hardness	9H
Touch technology	Multi-touch
Touchscreen type	Multi-user
Anti-glare surface	Yes
Display brightness	350 cd/m²
Display technology	LCD
Native refresh rate	60 Hz
Supported video modes	2160p
Viewable size diagonal	1892.7 mm
Contrast ratio (typical)	1200:1
Display number of colors	1.073 billion colors
Number of simultaneous touchpoints	20
Certification	UL
Product color	Black
Panel mounting interface	400 x 400 mm
Placement supported	Horizontal
Ethernet LAN (RJ-45) ports	1
Display viewable area (HxV)	1649.7 x 927.9 mm
Cables included	DisplayPort, HDMI, USB, VGA
DVI port	-
USB version	2.0/3.2 Gen 1 (3.1 Gen 1)
USB hub version	3.2 Gen 1 (3.1 Gen 1)
USB connector type	USB Type-A, USB Type-B
USB ports quantity	7
HDMI ports quantity	3
USB upstream port type	USB Type-B
Height adjustment	No
AC input voltage	100 - 240 V
Power supply type	AC
AC input frequency	50 - 60 Hz
Energy efficiency scale	A to G
Power consumption (max)	270 W
Power consumption (standby)	0.3 W
Power consumption (typical)	140 W
Operating altitude	0 - 5000 m
Non-operating altitude	0 - 12191 m
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 90 %
Operating relative humidity (H-H)	20 - 80 %
RMS rated power	40 W
Number of speakers	2
Sustainability certificates	RoHS, ENERGY STAR
Harmonized System (HS) code	85285210
Package weight	Weight of the packaged product in gram.

Weight and Dimensions

Depth	78.74 mm
Width	1734.82 mm
Height	1018.54 mm
Weight	64000 g
Display width	1735.02 mm
Display height	1017.44 mm
Depth (without stand)	79.1 mm
Width (without stand)	1735 mm
Height (without stand)	1017.4 mm
Weight (without stand)	76000 g