Users Guide
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... and moving your display 28 Maintenance guidelines 29 Cleaning your monitor 6 Package contents 6 Product features 8 Identifying parts and controls 9 Front view 9 Back view 10 Bottom view 11 Monitor specifications 12 Resolution specifications 13 Preset display modes 14 Electrical specifications 15 Speaker Specifications 16 Physical characteristics 16 Environmental characteristics 17 Video - Contents Safety instructions 5 About your monitor 29 Setting up the monitor 30 Connecting the stand 30 Using the tilt, swivel, and vertical extension 33 ...
... and moving your display 28 Maintenance guidelines 29 Cleaning your monitor 6 Package contents 6 Product features 8 Identifying parts and controls 9 Front view 9 Back view 10 Bottom view 11 Monitor specifications 12 Resolution specifications 13 Preset display modes 14 Electrical specifications 15 Speaker Specifications 16 Physical characteristics 16 Environmental characteristics 17 Video - Contents Safety instructions 5 About your monitor 29 Setting up the monitor 30 Connecting the stand 30 Using the tilt, swivel, and vertical extension 33 ...
Users Guide
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... Contacting Dell 80 EU product database for energy label and product information sheet 80 4 | Contents Tilt, swivel and vertical extension 33 Connecting your monitor 34 Organizing your cables 38 Securing your monitor using Kensington lock (optional 38 Removing the monitor stand 39 Wall mounting (Optional 40 Operating the monitor 41 Power on the monitor 41 Using the joystick control 41 Using the OSD lock function 43 Front‑panel button 46 Using the On-Screen Display (OSD) Menu...
... Contacting Dell 80 EU product database for energy label and product information sheet 80 4 | Contents Tilt, swivel and vertical extension 33 Connecting your monitor 34 Organizing your cables 38 Securing your monitor using Kensington lock (optional 38 Removing the monitor stand 39 Wall mounting (Optional 40 Operating the monitor 41 Power on the monitor 41 Using the joystick control 41 Using the OSD lock function 43 Front‑panel button 46 Using the On-Screen Display (OSD) Menu...
Users Guide
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... blue light emission from the screen to make viewing more comfortable for ease of set-up and screen optimization. • Power and OSD buttons lock. • Security lock slot. • ≤ 0.3 W in Standby Mode. • Supports both Picture by Picture (PBP) / Picture in Picture (PIP) Select Mode. • Allow user to switch USB KVM function in multi-monitor usage, enabling easier set up with an elegant viewing experience. • Extensive digital connectivity with TUV Rheinland (Hardware Solution) at factory reset/default setting model...
... blue light emission from the screen to make viewing more comfortable for ease of set-up and screen optimization. • Power and OSD buttons lock. • Security lock slot. • ≤ 0.3 W in Standby Mode. • Supports both Picture by Picture (PBP) / Picture in Picture (PIP) Select Mode. • Allow user to switch USB KVM function in multi-monitor usage, enabling easier set up with an elegant viewing experience. • Extensive digital connectivity with TUV Rheinland (Hardware Solution) at factory reset/default setting model...
Users Guide
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... the Monitor. 6 Mac address, Barcode, serial Refer to this label if you need to organize cables by inserting them through the slot. 10 | About your monitor x 100 mm-behind attached compatible wall mount kit (100 mm x 100 VESA cover) mm). 2 Regulatory label Lists the regulatory approvals. 3 Stand release button Releases stand from the monitor. 4 Power On/Off button To turn the monitor on or off. 5 Joystick Use it to control the OSD menu.
... the Monitor. 6 Mac address, Barcode, serial Refer to this label if you need to organize cables by inserting them through the slot. 10 | About your monitor x 100 mm-behind attached compatible wall mount kit (100 mm x 100 VESA cover) mm). 2 Regulatory label Lists the regulatory approvals. 3 Stand release button Releases stand from the monitor. 4 Power On/Off button To turn the monitor on or off. 5 Joystick Use it to control the OSD menu.
Users Guide
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... the sound from the computer to Type-C) from audio input. Monitor specifications Screen type Panel Type Aspect ratio Viewable image dimensions Diagonal Active Area Horizontal Vertical Area Pixel pitch Pixel per inch (PPI) Viewing angle Horizontal Vertical Brightness Contrast ratio Curvature Display screen coating Backlight Color depth Active matrix - You can use these ports 10Gbps Type-C only after you have connected the USB cable (Type-A to Type-B or Type-C to the monitor. 12 Super Speed Port with icon supports 5 V/ 3 A. You...
... the sound from the computer to Type-C) from audio input. Monitor specifications Screen type Panel Type Aspect ratio Viewable image dimensions Diagonal Active Area Horizontal Vertical Area Pixel pitch Pixel per inch (PPI) Viewing angle Horizontal Vertical Brightness Contrast ratio Curvature Display screen coating Backlight Color depth Active matrix - You can use these ports 10Gbps Type-C only after you have connected the USB cable (Type-A to Type-B or Type-C to the monitor. 12 Super Speed Port with icon supports 5 V/ 3 A. You...
Users Guide
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Resolution specifications Horizontal scan range Vertical scan range Maximum preset resolution Video display capabilities (HDMI & DP & Thunderbolt™ 3 (90 W) alternate mode) 27 kHz to 133.286 kHz 24 Hz to 86 Hz 5120 x 2160 at 2 A (max) • 1 x Analog 2.0 audio line out (3.5 mm jack) • 1 x RJ45 Border width (edge of monitor to active area) Top Left/Right Bottom 11.3 mm 11.3 mm 15.8 mm Adjustability Height adjustable stand 120 mm...
Resolution specifications Horizontal scan range Vertical scan range Maximum preset resolution Video display capabilities (HDMI & DP & Thunderbolt™ 3 (90 W) alternate mode) 27 kHz to 133.286 kHz 24 Hz to 86 Hz 5120 x 2160 at 2 A (max) • 1 x Analog 2.0 audio line out (3.5 mm jack) • 1 x RJ45 Border width (edge of monitor to active area) Top Left/Right Bottom 11.3 mm 11.3 mm 15.8 mm Adjustability Height adjustable stand 120 mm...
Users Guide
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Turn on your monitor to "product specific problems - Please refer to the computer: 1. Connecting the HDMI cable HDMI HDMI 34 | Setting up the monitor Turn off your monitor. 4. NOTE: U4021QW default setting is DisplayPort 1.4. A DisplayPort 1.1 Graphic card may not display normally. To connect your computer. Connect the DisplayPort or HDMI cable, and the Thunderbolt™ 4 (USB Type-C) active cable from the OSD Menu on your monitor and then turn on your computer. 2. Select the correct input source from your monitor WARNING: Before...
Turn on your monitor to "product specific problems - Please refer to the computer: 1. Connecting the HDMI cable HDMI HDMI 34 | Setting up the monitor Turn off your monitor. 4. NOTE: U4021QW default setting is DisplayPort 1.4. A DisplayPort 1.1 Graphic card may not display normally. To connect your computer. Connect the DisplayPort or HDMI cable, and the Thunderbolt™ 4 (USB Type-C) active cable from the OSD Menu on your monitor and then turn on your computer. 2. Select the correct input source from your monitor WARNING: Before...
Users Guide
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... 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable Exit 2. Yes No 3. Use the Lock menu to lock buttons. To unlock the Button, refer to lock the Menu Buttons? Once locked, pressing any control button will display the lock icon Operating the monitor | 43 Are you sure you want to the User's Guide. Select one of the following message appears. Using the OSD lock function You can lock the front-panel control buttons to prevent...
... 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable Exit 2. Yes No 3. Use the Lock menu to lock buttons. To unlock the Button, refer to lock the Menu Buttons? Once locked, pressing any control button will display the lock icon Operating the monitor | 43 Are you sure you want to the User's Guide. Select one of the following message appears. Using the OSD lock function You can lock the front-panel control buttons to prevent...
Users Guide
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... Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB Exit Operating the monitor | 49 Rename Inputs Allows you to set Auto Select for Thunderbolt™ to: ThunderboltTM • Prompt for Multiple Inputs: always show Switch to Thunderbolt™ Video Input message for user to choose whether to switch or not. • Yes: The monitor always switch to Thunderbolt™ video without asking while Thunderbolt™ 3 connected...
... Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB Exit Operating the monitor | 49 Rename Inputs Allows you to set Auto Select for Thunderbolt™ to: ThunderboltTM • Prompt for Multiple Inputs: always show Switch to Thunderbolt™ Video Input message for user to choose whether to switch or not. • Yes: The monitor always switch to Thunderbolt™ video without asking while Thunderbolt™ 3 connected...
Users Guide
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..., the luminance of the backlight defaults to 50 cd/m2 (typical). UltraSharp 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Preset Modes Input Color Format Reset Color Standard Movie Game Color Temp. Press the joystick left and right buttons to adjust the Red, Green, and Blue values and create your own preset color mode. 50 | Operating the monitor Color Space Custom Color Exit • Standard: Default Color setting, This monitor uses a low blue light panel, and is sRGB. You...
..., the luminance of the backlight defaults to 50 cd/m2 (typical). UltraSharp 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Preset Modes Input Color Format Reset Color Standard Movie Game Color Temp. Press the joystick left and right buttons to adjust the Red, Green, and Blue values and create your own preset color mode. 50 | Operating the monitor Color Space Custom Color Exit • Standard: Default Color setting, This monitor uses a low blue light panel, and is sRGB. You...
Users Guide
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... Off the Speaker function. Resets all settings under the Audio menu to 60 seconds. Move the joystick to adjust the slider in 1-second increments, from 0 to change the menu transparency by moving the joystick up or down (min. 0/max. 100). UltraSharp 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Language Transparency Timer Lock Reset Menu English 20 20s Disable Exit Language Transparency Timer Set the OSD display to set the volume level of...
... Off the Speaker function. Resets all settings under the Audio menu to 60 seconds. Move the joystick to adjust the slider in 1-second increments, from 0 to change the menu transparency by moving the joystick up or down (min. 0/max. 100). UltraSharp 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Others Language Transparency Timer Lock Reset Menu English 20 20s Disable Exit Language Transparency Timer Set the OSD display to set the volume level of...
Users Guide
Page 70
... a black background), if the monitor cannot sense a video signal and is functioning properly. Also, depending upon the selected input, one of computer. 3. Troubleshooting WARNING: Before you to check whether your monitor is working correctly. Turn off both your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps: 1. www.dell.com/U4021QW or No HDMI 1 Cable The display...
... a black background), if the monitor cannot sense a video signal and is functioning properly. Also, depending upon the selected input, one of computer. 3. Troubleshooting WARNING: Before you to check whether your monitor is working correctly. Turn off both your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps: 1. www.dell.com/U4021QW or No HDMI 1 Cable The display...
Users Guide
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... button to start the diagnostics. No Thunderbolt (90W) Cable The display will go into Standby Mode in diagnostics: 1. Check the video card and computer. then turn on the surface of the screen). 2. Troubleshooting | 71 A gray screen is functioning properly. www.dell.com/U4021QW 4. Observe if the screen has any screen abnormalities upon using the built-in diagnostic tool that the screen is clean (no dust particles on both your monitor...
... button to start the diagnostics. No Thunderbolt (90W) Cable The display will go into Standby Mode in diagnostics: 1. Check the video card and computer. then turn on the surface of the screen). 2. Troubleshooting | 71 A gray screen is functioning properly. www.dell.com/U4021QW 4. Observe if the screen has any screen abnormalities upon using the built-in diagnostic tool that the screen is clean (no dust particles on both your monitor...
Users Guide
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... be adjusted in image left on image displayed Windows Power Options or Mac Energy Saver the monitor for bent or broken pins in the video cable connector. Common Symptoms What You Experience Possible Solutions Intermittent Problems Monitor • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Check for appears on the application. • Adjust R/G/B value under Custom Color in Color menu OSD. • Change the Input Color...
... be adjusted in image left on image displayed Windows Power Options or Mac Energy Saver the monitor for bent or broken pins in the video cable connector. Common Symptoms What You Experience Possible Solutions Intermittent Problems Monitor • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Check for appears on the application. • Adjust R/G/B value under Custom Color in Color menu OSD. • Change the Input Color...
Users Guide
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... the monitor power cable, plug it back, and then turn on the keyboard. • Check whether the signal cable is not supported Windows 7. Problem What you experience Screen image is Image is too small centered on screen, but does not fill entire viewing area Cannot adjust the monitor with the buttons on the front panel OSD does not appear on the screen No Input Signal when user controls are pressed No picture, the LED light is not in the power saving mode...
... the monitor power cable, plug it back, and then turn on the keyboard. • Check whether the signal cable is not supported Windows 7. Problem What you experience Screen image is Image is too small centered on screen, but does not fill entire viewing area Cannot adjust the monitor with the buttons on the front panel OSD does not appear on the screen No Input Signal when user controls are pressed No picture, the LED light is not in the power saving mode...
Users Guide
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... Black screen Chrome OS @ after switch HDMI port on PBP mode 80/20 • Graphic Card Driver not able to support resolution 4096 x 2160. • Switch to Windows 10. Switch to PBP 75/25 or 50/50 No Display or USB not working No Display or USB not working on Switch to DP 1.2 or higher Control Panel at HDMI Port Troubleshooting | 75 HDMI displayed image • Switch PBP mode to 75/25 or 50/50 @ HDMI when • Plug/unplug HDMI cable connected to • Change input source...
... Black screen Chrome OS @ after switch HDMI port on PBP mode 80/20 • Graphic Card Driver not able to support resolution 4096 x 2160. • Switch to Windows 10. Switch to PBP 75/25 or 50/50 No Display or USB not working No Display or USB not working on Switch to DP 1.2 or higher Control Panel at HDMI Port Troubleshooting | 75 HDMI displayed image • Switch PBP mode to 75/25 or 50/50 @ HDMI when • Plug/unplug HDMI cable connected to • Change input source...
Users Guide
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... support 5120 x 2160 @ 60 Hz, check whether the platform meet either one of the following: 1. Problem What you experience Monitor Not able to displayed image select 5120 x at 3840 x 2160 2160 in Graphic @ 60 Hz Control Panel Monitor displays Not able to image at 5120 x select 5120 2160 @ 30Hz x 2160 @ when connected to 60 Hz Intel Graphic Card via TBT port No image when using Intel...
... support 5120 x 2160 @ 60 Hz, check whether the platform meet either one of the following: 1. Problem What you experience Monitor Not able to displayed image select 5120 x at 3840 x 2160 2160 in Graphic @ 60 Hz Control Panel Monitor displays Not able to image at 5120 x select 5120 2160 @ 30Hz x 2160 @ when connected to 60 Hz Intel Graphic Card via TBT port No image when using Intel...
Users Guide
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..., plug in the USB menu. • Reconnect the upstream cable to your computer. • Reconnect the USB peripherals (downstream connector). • Turn off the Computer and unplug the ThunderboltTM 4 (USB Type-C) active cable and power cord of the monitor. connect the device directly to the computer directly. • Disconnect one upstream USB cable when using two upstream connections. 78 | Troubleshooting Problem What you experience The LAN port is OS setting not...
..., plug in the USB menu. • Reconnect the upstream cable to your computer. • Reconnect the USB peripherals (downstream connector). • Turn off the Computer and unplug the ThunderboltTM 4 (USB Type-C) active cable and power cord of the monitor. connect the device directly to the computer directly. • Disconnect one upstream USB cable when using two upstream connections. 78 | Troubleshooting Problem What you experience The LAN port is OS setting not...
Users Guide
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... used. • Reconnect the upstream cable to input source and USB pairing table. functionalities Troubleshooting | 79 Ensure that the correct USB port is USB 3.0-capable. • Some computers have USB 3.0, USB 2.0, and USB 1.1 ports. Specific Symptoms What You Experience Possible Solutions USB Type-C port does not supply power USB peripherals • Check that the connected device is compliant can not be with your monitor. Super Speed USB 3.2 Gen2 peripherals working slowly or not working No USB...
... used. • Reconnect the upstream cable to input source and USB pairing table. functionalities Troubleshooting | 79 Ensure that the correct USB port is USB 3.0-capable. • Some computers have USB 3.0, USB 2.0, and USB 1.1 ports. Specific Symptoms What You Experience Possible Solutions USB Type-C port does not supply power USB peripherals • Check that the connected device is compliant can not be with your monitor. Super Speed USB 3.2 Gen2 peripherals working slowly or not working No USB...
Display Manager Users Guide
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... or a group of automatic settings, energy management, window organization, image rotation, and other features on selected Dell displays. Dell U4021QW - UltraSharp 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Display Info DDC/CI LCD Conditioning On Firmware O Service Tag Reset Others Factory Reset Others Exit 4 | Overview It enables manual adjustment of the displayed image, assignment of displays. Information about displays connected to communicate with your display. Standard NOTE: Dell Display Manager uses DDC/CI channel to...
... or a group of automatic settings, energy management, window organization, image rotation, and other features on selected Dell displays. Dell U4021QW - UltraSharp 40 Monitor Brightness/Contrast Input Source Color Display PIP/PBP USB Audio Menu Personalize Display Info DDC/CI LCD Conditioning On Firmware O Service Tag Reset Others Factory Reset Others Exit 4 | Overview It enables manual adjustment of the displayed image, assignment of displays. Information about displays connected to communicate with your display. Standard NOTE: Dell Display Manager uses DDC/CI channel to...