Dell UltraSharp 25 Series User Manual Download Page 25

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About your monitor

│

USB 3.0 downstream connector

Pin number

VCC

D-

D+

GND

SSRX-

SSRX+

GND

SSTX-

SSTX+

USB Type-C connector

9-pin side of the connector

Pin Number

Signal Name

Pin Number

Signal Name

GND

TX1+

TX2+

TX1-

TX2-

VBUS

CC1

CC2

D+

D-

SBU1

SBU2

Summary of Contents for UltraSharp 25 Series

Page 1: ...Dell UltraSharp 25 USB C Monitor U2520D U2520DR User s Guide Model U2520D U2520DR Regulatory model U2520Db ...

Page 2: ...r loss of data if instructions are not followed WARNING A WARNING indicates a potential for property damage personal injury or death Copyright 2020 Dell Inc or its subsidiaries All rights reserved Dell EMC and other trademarks are trademarks of Dell Inc or its subsidiaries Other trademarks may be trademarks of their respective owners 2020 01 Rev A00 ...

Page 3: ... modes 16 Preset display modes 16 Multi Stream Transport MST modes 17 Electrical specifications 17 Physical characteristics 18 Environmental characteristics 19 Power management modes 20 Pin assignments 21 Plug and play capability 24 Universal Serial Bus USB interface 24 USB 3 0 downstream connector 25 USB Type C connector 25 USB ports 26 LCD monitor quality and pixel policy 26 Maintenance guidelin...

Page 4: ...nizing your cables 35 Removing the monitor stand 35 VESA wall mounting optional 36 Operating the monitor 37 Power on the monitor 37 Using the front panel controls 37 Front panel button 38 Using the On Screen Display OSD menu 39 Accessing the menu system 39 OSD warning message 53 Setting the maximum resolution 56 Requirements to view or playback HDR content 57 Using the tilt swivel and vertical ext...

Page 5: ... Built in diagnostics 63 Always On USB Type C Charging 64 Common problems 64 Product specific problems 68 Universal Serial Bus USB specific problems 69 Appendix 71 FCC notices U S only and other regulatory information 71 Contact Dell 71 ...

Page 6: ...t Dell technical support For more information see Contact Dell NOTE Some items may be optional and may not ship with your monitor Some features may not be available in certain countries NOTE If you are attaching a stand that you purchased from any other source follow the set up instructions that were included with the stand Monitor Stand riser Stand base ...

Page 7: ...DisplayPort to DisplayPort for U2520D HDMI cable for U2520DR USB Type C cable enables the USB ports on the monitor USB Type C to Type A cable enables the USB ports on the monitor Quick Setup Guide Factory calibration report Safety Environmental and Regulatory Information ...

Page 8: ...e bezel gap in multi monitor usage enabling easier setup with an elegant viewing experience Removable stand and Video Electronics Standards Association VESA 100 mm mounting holes for flexible mounting solutions Equipped with 1 USB Type C upstream port 1 USB Type C downstream port and 3 USB Type A downstream ports Plug and play capability if supported by your system On Screen Display OSD adjustment...

Page 9: ...ut your monitor 9 Identifying parts and controls Front view Front panel controls Label Description 1 Function buttons For more information see Operating the monitor 2 Power On Off button with LED indicator ...

Page 10: ...onitor using VESA compatible wall mount kit 100 mm x 100 mm 2 Regulatory label Lists the regulatory approvals 3 Stand release button Releases stand from the monitor 4 Barcode serial number and Service Tag label Refer to this label if you need to contact Dell for technical support 5 Cable management slot Use to organize cables by inserting them through the slot ...

Page 11: ...t your USB device NOTE To use these ports you must connect the USB Type C cable shipped with your monitor to the USB Type C upstream port on the monitor and to your computer To avoid signal interference when a wireless USB device has been connected to a USB downstream port it is NOT recommended to connect any other USB devices to the adjacent port s ...

Page 12: ...rt cable shipped with U2520D 5 Stand lock feature To lock the stand to the monitor using a M3 x 6 mm screw screw not included 6 USB Type C port Connect the USB Type C cable that came with your monitor to the computer or mobile device This port supports USB Power Delivery Data and DisplayPort video signal The USB 3 0 Type C port offers the fastest transfer rate and the alternate mode with DP 1 4 su...

Page 13: ...playPort out DisplayPort output for MST multi stream transport capable monitor To enable MST see Connecting the monitor for DP Multi Stream Transport MST function NOTE Remove the rubber plug when using DisplayPort out connector 8 Audio line out port Connect your speakers 9 USB downstream port 2 Connect your USB device NOTE To use this port you must connect the USB Type C cable shipped with your mo...

Page 14: ...m x 0 216 mm Pixel per inch PPI 117 5 Viewing angle 178 vertical typical 178 horizontal typical Luminance output 350 cd m typical Contrast ratio 1000 to 1 typical Faceplate coating Anti Glare with 3H hardness Backlight White LED edgelight system Response time 8 ms Normal 5 ms Fast Color depth 16 78 million colors Color gamut 99 sRGB 99 REC709 and 95 DCI P3 Calibration accuracy Delta E 2 average Bu...

Page 15: ...y PD up to 90 W 1 x USB Type C downstream port with charging capability at 3 A maximum 1 x USB 3 0 with BC1 2 charging capability at 2 A maximum 2 x USB 3 0 downstream port 1 x audio line out port Border width edge of monitor to active area 7 3 mm Top 7 4 mm Left Right 9 5 mm Bottom Adjustability Height adjustable stand Tilt Swivel Pivot 130 mm 5 to 21 45 to 45 90 to 90 Dell Display Manager compat...

Page 16: ...U2520D U2520DR Model U2520D U2520DR Display mode Horizontal frequency kHz Vertical frequency Hz Pixel clock MHz Sync polarity Horizontal Vertical 720 x 400 31 50 70 00 28 30 VESA 640 x 400 31 50 60 00 25 20 VESA 640 x 480 37 50 75 00 31 50 VESA 800 x 600 37 90 60 30 40 00 VESA 800 x 600 46 90 75 00 49 50 VESA 1024 x 768 48 40 60 00 65 00 VESA 1024 x 768 60 00 75 00 78 80 VESA 1152 x 864 67 50 75 0...

Page 17: ... frequency current 100 VAC to 240 VAC 50 Hz or 60 Hz 3 Hz 2 5 A typical Inrush current 120 V 40 A Max at 0 C cold start 240 V 80 A Max at 0 C cold start Not supporting the HDMI 2 0 optional specification including HDMI Ethernet Channel HEC Audio Return Channel ARC standard for 3D format and resolutions and standard for 4K digital cinema resolution HDR HBR3 DisplayPort 1 4 MST DP audio is supported...

Page 18: ...to manufacture these cables Dell does not guarantee video performance on cables that are not shipped with your Dell monitor Dimensions with stand Height extended 512 9 mm 20 19 in Height compressed 382 9 mm 15 08 in Width 567 7 mm 22 35 in Depth 185 0 mm 7 28 in Dimensions without stand Height 332 1 mm 13 07 in Width 567 7 mm 22 35 in Depth 49 9 mm 1 96 in Stand dimensions Height extended 418 4 mm...

Page 19: ...o 40 C 32 F to 104 F Non operating Storage 20 C to 60 C 4 F to 140 F Shipping 20 C to 60 C 4 F to 140 F Operating 10 to 80 non condensing Non operating Storage 5 to 90 non condensing Shipping 5 to 90 non condensing Operating 5000 m 16404 ft maximum Non operating 12192 m 40000 ft maximum 682 6 BTU hour maximum 81 9 BTU hour typical Weight without stand assembly For wall mount or VESA mount consider...

Page 20: ...6 W Total Energy Consumption TEC 66 2 kWh Zero power consumption in OFF mode can only be achieved by disconnecting the main cable from the monitor Maximum power consumption with max luminance and USB active This document is informational only and reflects laboratory performance Your product may perform differently depending on the software components and peripherals you ordered and shall have no o...

Page 21: ...n kWh as defined in Energy Star 8 0 version About your monitor 21 Pin assignments DisplayPort connector in Pin number 20 pin side of the connected signal cable 1 ML3 n 2 GND 3 ML3 p 4 ML2 n 5 GND 6 ML2 p 7 ML1 n 8 GND 9 ML1 p 10 ML0 n 11 GND 12 ML0 p 13 GND 14 GND 15 AUX p 16 GND 17 AUX n 18 Hot Plug Detect ...

Page 22: ...PWR 20 3 3 V DP_PWR Pin number 20 pin side of the connected signal cable 1 ML0 p 2 GND 3 ML0 n 4 ML1 p 5 GND 6 ML1 n 7 ML2 p 8 GND 9 ML2 n 10 ML3 p 11 GND 12 ML3 n 13 CONFIG1 14 CONFIG2 15 AUX CH p 16 GND 17 AUX CH n 18 Hot Plug Detect 19 Return 20 DP_PWR ...

Page 23: ...2 4 TMDS DATA 1 5 TMDS DATA 1 SHIELD 6 TMDS DATA 1 7 TMDS DATA 0 8 TMDS DATA 0 SHIELD 9 TMDS DATA 0 10 TMDS CLOCK 11 TMDS CLOCK SHIELD 12 TMDS CLOCK 13 CEC 14 Reserved N C on device 15 DDC CLOCK SCL 16 DDC DATA SDA 17 DDC CEC Ground 18 5 V POWER 19 HOT PLUG DETECT About your monitor 23 HDMI connector ...

Page 24: ...n about changing the monitor settings see Operating the monitor Universal Serial Bus USB interface This section gives you information about the USB ports that are available on the monitor Transfer speed Data rate Power consumption Super Speed 5 Gbps 4 5 W Max each port High speed 480 Mbps 4 5 W Max each port Full speed 12 Mbps 4 5 W Max each port NOTE This monitor is Super Speed USB 3 0 compatible...

Page 25: ...ber 1 VCC 2 D 3 D 4 GND 5 SSRX 6 SSRX 7 GND 8 SSTX 9 SSTX USB Type C connector 9 pin side of the connector Pin Number Signal Name Pin Number Signal Name A1 GND B1 GND A2 TX1 B2 TX2 A3 TX1 B3 TX2 A4 VBUS B4 VBUS A5 CC1 B5 CC2 A6 D B6 D A7 D B7 D A8 SBU1 B8 SBU2 ...

Page 26: ... pixels to become fixed in an unchanging state which are hard to see and do not affect the display quality or usability For more information on Dell Monitor Quality and Pixel Policy see www dell com support monitors Maintenance guidelines Cleaning your monitor CAUTION Read and follow the Safety instructions before cleaning the monitor WARNING Before cleaning the monitor unplug the monitor power ca...

Page 27: ...tor If you notice white powder when you unpack your monitor wipe it off with a cloth Handle your monitor with care as a darker colored monitor may get scratched and show white scuff marks more than a lighter colored monitor To help maintain the best image quality on your monitor use a dynamically changing screen saver and turn off your monitor when not in use ...

Page 28: ...hased from any other source follow the set up instructions that were included with the stand To attach the monitor stand 1 Follow the instructions on the flaps of carton to remove the stand from the top cushion that secures it 2 Remove the stand riser and stand base from the packaging cushion 3 Insert the stand base blocks fully into the stand slot 4 Lift the screw handle and turn the screw clockw...

Page 29: ...cover as shown to access the VESA area for stand assembly 7 Attach the stand assembly to the monitor a Fit the two tabs on the upper part of the stand to the groove on the back of the monitor b Press the stand down till it snaps into place ...

Page 30: ...30 Setting up the monitor 8 Place the monitor upright NOTE Lift the monitor carefully to prevent it from slipping or falling 9 Remove the cover from the monitor ...

Page 31: ...d for the purpose of illustration only Appearance of the computer may vary To connect your monitor to the computer 1 Turn Off your computer and disconnect the power cable 2 Connect the DisplayPort HDMI or USB Type C cable from your monitor to the computer Connecting the DisplayPort DisplayPort to DisplayPort cable for U2520D NOTE The default out of factory setting is DP1 4 DP1 2 is supported If th...

Page 32: ...g the HDMI cable for U2520DR NOTE The default out of factory setting is HDMI 2 0 If the monitor fails to show any content after the HDMI cable is connected follow the procedures below to change the settings from HDMI 2 0 to HDMI 1 4 Press any button except the button to activate the OSD menu Use the and buttons to highlight Input Source then use the button enter the submenu Use the and buttons to ...

Page 33: ...ype C cable NOTE Use the USB Type C cable shipped with monitor only This port supports DisplayPort Alternate Mode DP1 4 standard only The USB Type C power delivery compliant port PD Version 3 0 delivers up to 90 W of power If your notebook requires more than 90 W to operate and the battery is drained it may not be powered up or charged with the USB PD port of this monitor ...

Page 34: ... feature your PC Graphics Card must be certified to DP1 2 with MST option NOTE Remove the rubber plug when using DP out connector Connecting the monitor for USB C Multi Stream Transport MST function NOTE The maximum number of supported monitors via MST is subjected to the bandwidth of the USB C source NOTE Remove the rubber plug when using DP out connector ...

Page 35: ...removing the stand ensure that the monitor is placed on a soft clean surface NOTE The following instructions are applicable only for attaching the stand that was shipped with your monitor If you are attaching a stand that you purchased from any other source follow the set up instructions that were included with the stand To remove the stand 1 Place the monitor on a soft cloth or cushion 2 Press an...

Page 36: ...ve the stand See Removing the monitor stand 3 Use a Phillips crosshead screwdriver to remove the four screws securing the plastic cover 4 Attach the mounting bracket from the wall mounting kit to the monitor 5 Mount the monitor on the wall For more information see the documentation that shipped with the wall mounting kit NOTE For use only with UL or CSA or GS listed wall mount bracket with minimum...

Page 37: ...ontrol buttons on the front of the monitor to adjust settings The following table describes the front panel buttons Front panel button Description 1 Shortcut key Preset Modes Use this button to choose from a list of preset color modes 2 Shortcut key Input Source Use this button to choose from a list of video signals that may be connected to your monitor ...

Page 38: ...tems in the OSD menu 3 OK Use the OK button to confirm your selection 4 Back Use the Back button to go back to the previous menu 3 Menu Use the MENU button to launch the On Screen Display OSD See Accessing the menu system 4 Exit Use this button to exit the OSD main menu 5 Power with power light indicator Use the Power button to turn the monitor On and Off The white light indicates the monitor is O...

Page 39: ...tween the setting options As you move from one icon to another the option name is highlighted See the following table for a complete list of all the options available for the monitor 3 Press the or or button once to activate the highlighted option NOTE The directional buttons and the OK button displayed may differ according to the menu you ve selected Use available buttons to make your selection 4...

Page 40: ...ess the button to decrease the brightness min 0 max 100 NOTE Manual adjustment of Brightness is disabled when Smart HDR is activated Contrast Adjusts the Brightness first and then adjust the Contrast only if further adjustment is necessary Press the button to increase the contrast and press the button to decrease the contrast min 0 max 100 The Contrast function adjusts the degree of difference bet...

Page 41: ...when you are using the USB Type C connector Press the button to confirm the selection DP Select the DP input when you are using the DisplayPort DP connector Press the button to confirm the selection HDMI Select the HDMI input when you are using the HDMI connector Press the button to confirm the selection Auto Select Turning on the function allows you to scan for available input sources ...

Page 42: ... to switch or not Yes Always switches to USB C video input without asking when the USB Type C cable is connected No Never automatically switches to USB C video input when the USB Type C cable is connected NOTE Auto Select for USB C is available only when Auto Select is on Reset Input Source Resets your monitor input settings to the factory settings Color Use Color to adjust the color setting mode ...

Page 43: ... cause personal injury such as digital eye strain eye fatigue and damage to the eyes Using monitor for extended periods of time may also cause pain in parts of body such as neck arm back and shoulder To reduce the risk of eye strain and neck arm back shoulder pain from using the monitor for long periods of time we suggest you to 1 Set the distance of the screen between 20 to 28 in 50 70 cm from yo...

Page 44: ...000K 5700K 6500K 7500K 9300K and 10000K Press the button to confirm the selection Color Space Allows you to set the color space to sRGB matches 99 sRGB DCI P3 reproduces 95 of DCI P3 digital cinema color standard NOTE When you select DCI P3 as the color space the luminance of the backlight defaults to 48 cd m2 typical You can manually adjust the luminance of the backlight by using the Brightness f...

Page 45: ...on Hue This feature can shift the color of the video image to green or purple This is used to adjust the desired flesh tone color Use or to adjust the hue from 0 to 100 NOTE Hue adjustment is available only when you select Movie or Game preset mode Saturation This feature can adjust the color saturation of the video image Use or to adjust the saturation from 0 to 100 NOTE Saturation adjustment is ...

Page 46: ...ust the sharpness from 0 to 100 Response Time Allows you to set the Response Time to Normal or Fast MST DisplayPort Multi Stream Transport The default setting is Off To enable MST DP out select On NOTE When the DisplayPort USB Type C upstream cable and the DP downstream cable are connected the monitor will automatically set MST to On This action will only be done once after Factory Reset or Reset ...

Page 47: ...emble true to life visuals The default setting is Off You may set the Smart HDR mode to Desktop Suitable for using the monitor with a desktop computer Movie HDR Suitable for the playback of HDR video content Game HDR Suitable for playing HDR compatible games It displays more realistic scenes and makes the gaming experience immersive and entertaining DisplayHDR Compliant with the DisplayHDR 400 sta...

Page 48: ...an Portuguese Russian Simplified Chinese or Japanese Rotation Rotates the OSD by 90 degrees counter clockwise and anticounter clockwise You can adjust the menu according to your Display Rotation Transparency Select this option to change the menu transparency by pressing the and buttons min 0 max 100 Timer Sets the length of time the OSD will remain active after the last time you pressed a button U...

Page 49: ...nly the Power button is locked and not accessible by the user Menu Power Buttons Both the Menu function Power buttons are locked and not accessible by the user The default setting is Disable Alternative Lock Method for Menu function buttons You can also press and hold the Menu function button next to the Power button for 4 seconds to set the lock options NOTE To unlock the button s press and hold ...

Page 50: ...le or disable the Always On USB Type C Charging function during monitor Power Off mode Other USB Charging Allows you to enable or disable USB Type A and USB Type C Downstream Ports charging function during monitor standby mode NOTE This option is only available when the USB Type C Upstream Port cable is unplugged If the USB Type C cable is connected Other USB Charging follows the USB host power st...

Page 51: ...splays the monitor s current settings DDC CI DDC CI Display Data Channel Command Interface allows your monitor parameters brightness color balance and etc to be adjustable via the software on your computer You can disable this feature by selecting Off Enable this feature for best user experience and optimum performance of your monitor ...

Page 52: ...isplays the firmware version of your monitor Service Tag Displays the service tag of your monitor This string is required when you look for phone support check your warranty status update drivers on Dell s website etc Reset Others Resets all settings under the Others menu to the factory preset values Factory Reset Restore all preset values to the factory default settings These are also the setting...

Page 53: ...r See Monitor specifications for the Horizontal and Vertical frequency ranges addressable by this monitor Recommended mode is 2560 x 1440 NOTE The message may be slightly different according to the connected input signal You will see the following message before the DDC CI function is disabled You will see the following message before the Lock function is activated NOTE The message may be slightly...

Page 54: ... signal The OSD functions only in the normal operation mode If you press any button other than the power button during the Active off mode the following message will appear depending on the selected input Activate the computer and the monitor to gain access to the OSD NOTE The message may be slightly different according to the connected input signal When Smart HDR is activated and you try to chang...

Page 55: ...s shown below appears NOTE The message may be slightly different according to the connected input signal When the monitor is under DP HDMI input and a USB Type C cable is connected to a notebook that supports DP Alternate Mode if Auto Select for USB C is enabled the following message appears When Factory Reset is selected the following message appears ...

Page 56: ...t the maximum resolution for the monitor In Windows 7 Windows 8 and Windows 8 1 1 For Windows 8 and Windows 8 1 only select the Desktop tile to switch to classic desktop 2 Right click on the desktop and click Screen Resolution 3 Click the dropdown list of the Screen Resolution and select 2560 x 1440 4 Click OK In Windows 10 1 Right click on the desktop and click Display settings 2 Click Advanced d...

Page 57: ... the graphics card used is HDR capable i e HDMI2 0a with HDR option compliant and HDR graphics driver is installed HDR capable player application must be used e g Cyberlink PowerDVD 17 Windows 10 Movies and TV app For example Dell XPS 8910 Alienware Aurora R5 bundled with the below graphics cards Dell Graphics driver with HDR support Refer to Dell support page to download the latest graphics drive...

Page 58: ...re appropriate DRM software and or hardware e g Microsoft Playready Refer to Microsoft website for HDR support information Using the tilt swivel and vertical extension NOTE The following instructions are applicable only for attaching the stand that was shipped with your monitor If you are attaching a stand that you purchased from any other source follow the set up instructions that were included w...

Page 59: ...tically up to 130 mm The figure below illustrates how to extend the stand vertically Rotating the monitor Before you rotate the monitor your monitor should be fully vertically extended Vertical extension and fully tilted up to avoid hitting the bottom edge of the monitor ...

Page 60: ...ll computer you require an updated graphics driver that is not included with this monitor To download the graphics driver go to www dell com support and see the Download section for Video Drivers for latest driver updates NOTE When in the Portrait View Mode you may experience performance degradation in graphic intensive applications 3D Gaming and etc ...

Page 61: ...y Settings 1 Right click on the desktop and click Properties 2 Select the Settings tab and click Advanced 3 If you have an ATI graphics card select the Rotation tab and set the preferred rotation 4 If you have an nVidia graphics card click the nVidia tab in the left hand column select NVRotate and then select the preferred rotation 5 If you have an Intel graphics card select the Intel graphics tab...

Page 62: ...r 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 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 ...

Page 63: ...our monitor is functioning properly Built in diagnostics Your monitor has a built in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your monitor or with your computer and video card NOTE You can run the built in diagnostics only when the video cable is unplugged and the monitor is in self test mode To run the built in diagnostics...

Page 64: ... verify your current firmware revision in Firmware If this is not available go to the Dell download support site for the latest application installer Monitor Firmware Update Utility exe and refer to the Firmware Update Instruction User s Guide www dell com U2520D or www dell com U2520DR Common problems The following table contains general information about common monitor problems you might encount...

Page 65: ...o Shaky Jittery Video Wavy picture or fine movement Reset the monitor to factory settings Check environmental factors Relocate the monitor and test in another room Missing Pixels LCD screen has spots Cycle power On Off Pixel that is permanently Off is a natural defect that can occur in LCD technology For more information on Dell Monitor Quality and Pixel Policy see Dell Support site at http www de...

Page 66: ... Synchronization Problems Screen is scrambled or appears torn Reset the monitor to factory settings Perform monitor self test feature check to determine if the scrambled screen appears in self test mode Check for bent or broken pins in the video cable connector Restart the computer in the safe mode Safety Related Issues Visible signs of smoke or sparks Do not perform any troubleshooting steps Cont...

Page 67: ...Color menu OSD depending on the application Adjust the R G B values under Custom Color in Color menu OSD Change the Input Color Format to PC RGB or YPbPr in the Color menu OSD Run the built in diagnostics Image retention from a static image left on the monitor for a long period of time Faint shadow from the static image displayed appears on the screen Use the Power Management feature to turn off t...

Page 68: ...picture the LED light is white Check the signal source Ensure the computer is not in the power saving mode by moving the mouse or pressing any key on the keyboard Check whether the signal cable is plugged in properly Re plug the signal cable if necessary Reset the computer or video player The picture does not fill the entire screen The picture cannot fill the height or width of the screen Due to d...

Page 69: ...ice directly to the computer system USB Type C port does not supply power USB peripherals can not be charged Check that the connected device is compliant with the USB C specification The USB Type C port supports USB 2 0 and an output of 90 W Check that you use the USB Type C cable shipped with your monitor Super Speed USB 3 0 interface is slow Super Speed USB 3 0 peripherals working slowly or not ...

Page 70: ...orking as the distance between itself and its receiver decreases Increase the distance between the USB 3 0 peripherals and the wireless USB receiver Position your wireless USB receiver as close as possible to the wireless USB peripherals Use a USB extender cable to position the wireless USB receiver as far away as possible from the USB 3 0 port ...

Page 71: ...latory information see the regulatory compliance website located at www dell com regulatory_compliance Contact Dell For customers in the United States call 800 WWW DELL 800 999 3355 NOTE If you do not have an active Internet connection you can find contact information on your purchase invoice packing slip bill or Dell product catalog Dell provides several online and telephone based support and ser...

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