Dell Chromebook 3120 Owner's Manual
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Dell Chromebook 3120 Owner's Manual

Dell Chromebook 3120 Owner's Manual

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Chromebook 3120
Owner's Manual
Regulatory Model: P29T
Regulatory Type: P29T004
June 2024
Rev. A01

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Summary of Contents for Dell Chromebook 3120

  • Page 1 Chromebook 3120 Owner's Manual Regulatory Model: P29T Regulatory Type: P29T004 June 2024 Rev. A01...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2024 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

  • Page 3: Table Of Contents

    Top......................................7 Front....................................... 8 Bottom....................................9 Service Tag................................... 9 Battery charge and status light .............................10 Chapter 2: Set up your Chromebook 3120..................11 Chapter 3: Specifications of Chromebook 3120................12 Dimensions and weight..............................12 Processor..................................... 12 Chipset....................................13 Operating system................................13 Memory....................................13...
  • Page 4 Recommended tools................................. 25 Screw list.....................................25 Major components of Chromebook 3120........................26 Chapter 5: Removing and installing Customer Replaceable Units (CRUs)........29 Base cover..................................29 Removing the base cover (for models without WWAN)................... 29 Installing the base cover (for models without WWAN)..................32 Chapter 6: Removing and installing Field Replaceable Units (FRUs)..........
  • Page 5 Drivers and downloads..............................103 Frequently asked questions............................103 Chapter 8: Troubleshooting....................... 105 Handling swollen rechargeable Li-ion batteries......................105 Locating the Service Tag or Express Service Code of your Dell computer ............. 105 Chromebook storage..............................106 Overview..................................106 Battery management..............................106 Preparing the Chromebook for long-term storage.................... 107 Getting your Chromebook ready..........................

  • Page 6: Chapter 1: Views Of Chromebook 3120

    Views of Chromebook 3120 Right Figure 1. Right view 1. USB 3.2 Gen 1 (5 Gbps) Type-C with DisplayPort Alt Mode port (optional) Connect devices such as external storage devices, printers, and external displays. Provides data transfer speeds up to 5 Gbps.

  • Page 7: Top

    4. Headset (headphone and microphone combo) port Connect headphones or a headset (headphone and microphone combo). Figure 3. Top view 1. Power button Press to turn on the computer if it is turned off. 2. Keyboard Views of Chromebook 3120...

  • Page 8: Front

    Enables you to video chat, capture photos, and record videos. 3. Camera-status light Turns on when the camera is in use. 4. Right microphone Provides digital sound input for audio recording and voice calls. 5. Display Provides visual output. Views of Chromebook 3120...

  • Page 9: Bottom

    2. Speakers Provide audio output. Service Tag The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in your computer and access warranty information. Views of Chromebook 3120...

  • Page 10: Battery Charge And Status Light

    Figure 6. Service Tag location Battery charge and status light The following table lists the battery charge and status light behavior of your Chromebook 3120. Table 1. Battery charge and status light behavior  Power Source LED Behavior System Power State...

  • Page 11: Chapter 2: Set Up Your Chromebook 3120

    Set up your Chromebook 3120 About this task NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Steps 1. Connect the power adapter and press the power button. CAUTION: Connect the power cable to a power distribution Unit (PDU) 16 A and then connect the PDU to the wall outlet.

  • Page 12: Chapter 3: Specifications Of Chromebook 3120

    NOTE: The weight of your computer depends on the configuration that is ordered and manufacturing variability. Processor The following table lists the details of the processors that are supported in your Chromebook 3120. Table 3. Processor  Description Values Processor type...

  • Page 13: Chipset

    Chipset The following table lists the details of the chipset that is supported in your Chromebook 3120. Table 4. Chipset  Description Values Chipset BGA 1264 Processor Intel Processor N100 DRAM bus width 64-bit Flash EPROM 16 MB PCIe bus Up to Gen3...

  • Page 14: External Ports And Slots

    Security-cable slot One Wedge-shaped security slot SIM-card slot nano-SIM slot Wireless module The following table lists the Wireless Local Area Network (WLAN) module that is supported on your Chromebook 3120. Table 8. Wireless module specifications  Description Values Model number Intel Wi-Fi 6 AX203...

  • Page 15: Wwan Module

    ● AES-CCMP ● TKIP Bluetooth wireless card Bluetooth 5.2 wireless card (Chrome) WWAN module The following table lists the Wireless Wide Area Network (WWAN) module supported on your Chromebook 3120. Table 9. WWAN module specifications  Description Values Model number Qualcomm Snapdragon SDX12 Global LTE-Advanced...

  • Page 16: Storage

    Microphone Single-array microphone or Dual-array microphones Storage This section lists the storage options on your Chromebook 3120. Your Chromebook 3120 system supports one 64 GB eMMC onboard storage. NOTE: Storage is onboard and cannot be upgraded. Table 11. Storage specifications ...

  • Page 17: Camera

    You can define the primary behavior of the function keys (F1–F12) changing Function Key Behavior in BIOS setup program. Camera The following table lists the camera specifications of your Chromebook 3120. Table 13. Camera specifications  Description Values Number of cameras...

  • Page 18: Power Adapter

    Power adapter The following table lists the power adapter specifications of your Chromebook 3120. Table 15. Power adapter specifications  Description Values Type 65 W AC adapter, USB Type-C Power-adapter dimensions: Height 28 mm (1.10 in.) Width 51 mm (2.01 in.) Depth 112 mm (4.41 in.)

  • Page 19: Display

    CAUTION: Dell Technologies recommends that you charge the battery regularly for optimal power consumption. If your battery charge is depleted, connect the power adapter, turn on your computer, and then restart your computer to reduce the power consumption.

  • Page 20: Sensor

    Processor Intel UHD Graphics Shared system memory Intel Processor N100 External display support The following table lists the external display support for your Chromebook 3120. Table 20. External display support  Graphics card Supported external displays with Supported external displays with...

  • Page 21: Hardware Security

    Table 21. Hardware security   Hardware security H1 security chip One Wedge-shaped lock slot Operating and storage environment This table lists the operating and storage specifications of your Chromebook 3120. Airborne contaminant level: G1 as defined by ISA-S71.04-1985 Table 22. Computer environment  Description Operating...

  • Page 22: Chapter 4: Working Inside Your Computer

    You should only perform troubleshooting and repairs as authorized or directed by the Dell technical support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at Dell Regulatory Compliance Home Page.

  • Page 23: Safety Precautions

    ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

  • Page 24: Esd Field Service Kit

    ● Use a wired ESD wrist strap that is properly grounded. Wireless anti-static straps do not provide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts with increased sensitivity to ESD damage. ● Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads. ●...

  • Page 25: Transporting Sensitive Components

    Transporting sensitive components When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.

  • Page 26: Major Components Of Chromebook 3120

    M2.5x5 Bottom-left I/O bracket M2x4 System board M2x4 Display assembly M2.5x5 Display bezel M2.5x3.8 Display panel M2x3 Display hinges M2x3 M2.5x2.5 Major components of Chromebook 3120 The following image shows the major components of Chromebook 3120. Working inside your computer...
  • Page 27 1. Base cover 2. System board 3. Battery 4. Speakers 5. Palm-rest 6. Display assembly 7. I/O board Working inside your computer...
  • Page 28 NOTE: Dell provides a list of components and their part numbers for the original computer configuration purchased. These parts are available according to warranty coverage purchased by the customer. Contact your Dell sales representative for purchase options. Working inside your computer...

  • Page 29: Chapter 5: Removing And Installing Customer Replaceable Units (Crus)

    Removing and installing Customer Replaceable Units (CRUs) The replaceable components in this chapter are Customer Replaceable Units (CRUs). CAUTION: Customers can replace only the Customer Replaceable Units (CRUs) following the safety precautions and replacement procedures. NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Base cover Removing the base cover (for models without WWAN) Prerequisites...
  • Page 30 Figure 8. Removing the base cover Removing and installing Customer Replaceable Units (CRUs)
  • Page 31 Figure 9. Removing the base cover Figure 10. Disconnecting the battery cable Removing and installing Customer Replaceable Units (CRUs)

  • Page 32: Installing The Base Cover (For Models Without Wwan)

    Steps 1. Loosen the nine captive (Phillips #1) screws that secure the base cover to the palm-rest assembly. 2. Using a plastic scribe, pry the base cover from the U-shaped indents at the top and continue working on the sides to open the base cover.
  • Page 33 Figure 12. Installing the base cover Removing and installing Customer Replaceable Units (CRUs)
  • Page 34 Figure 13. Installing the base cover Steps 1. Connect the battery cable to the connector (BATT) on the system board. 2. Place the base cover on top of the palm-rest assembly. 3. Align the screw holes on the base cover with the screw holes on the palm-rest assembly, and snap the base cover into place. 4.

  • Page 35: Chapter 6: Removing And Installing Field Replaceable Units (Frus)

    To avoid any potential damage to the component or loss of data, ensure that an authorized service technician replaces the Field Replaceable Units (FRUs). CAUTION: Dell Technologies recommends that this set of repairs, if needed, to be conducted by trained technical repair specialists. CAUTION: As a reminder, your warranty does not cover damages that may occur during FRU repairs that are not authorized by Dell Technologies.
  • Page 36 Figure 14. Removing the base cover Removing and installing Field Replaceable Units (FRUs)
  • Page 37 Figure 15. Removing the base cover Removing and installing Field Replaceable Units (FRUs)

  • Page 38: Installing The Base Cover (For Models With Wwan)

    1. Loosen the nine captive screws that secure the base cover to the palm-rest assembly. NOTE: For Chromebook 3120 computers shipped with WWAN card, the base cover is secured using Torx 6 (not Phillips #1) screws. 2. Using a plastic scribe, pry the base cover from the U-shaped indents at the top and continue working on the sides to open the base cover.
  • Page 39 Figure 17. Installing the base cover Removing and installing Field Replaceable Units (FRUs)
  • Page 40 Figure 18. Installing the base cover Removing and installing Field Replaceable Units (FRUs)

  • Page 41: Sim Card Tray

    3. Align the screw holes on the base cover with the screw holes on the palm-rest assembly, and snap the base cover into place. 4. Tighten the nine captive screws to secure the base cover to the palm-rest assembly. NOTE: For Chromebook 3120 computers shipped with WWAN card, the base cover is secured using Torx 6 (not Phillips #1) screws. Next steps 1.

  • Page 42: Installing The Sim Card

    2. Slide the SIM card out from the slot on the system board. NOTE: For Chromebook 3120 computers with WWAN card, the SIM card slot is located on the bottom-left side of the system board. The SIM card must be transferred to the new system board when replacing the system board.

  • Page 43: Wireless Wide Area Network (Wwan) Card

    1. Align and slide the SIM card into the SIM card slot on the system board. NOTE: For Chromebook 3120 computers with WWAN card, the SIM card slot is located on the bottom-left side of the system board. The SIM card must be transferred to the new system board when replacing the system board.
  • Page 44 Steps 1. Remove the screw (M2x3) that secures the WWAN-card bracket to the WWAN card on the system board. 2. Remove the WWAN-card bracket from the WWAN card. 3. Disconnect the WWAN antenna cables from the connectors on the WWAN card. 4.

  • Page 45: Installing The Wwan Card

    Installing the WWAN card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task NOTE: The following steps are applicable only for computers that are shipped with a WWAN card. The following image indicates the location of the WWAN card and provides a visual representation of the installation procedure. Removing and installing Field Replaceable Units (FRUs)

  • Page 46: Battery

    ● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a rechargeable Li-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See Contact Support at Dell Support Site.

  • Page 47: Installing The Battery

    Figure 20. Removing the battery Steps 1. Open the latch, and using the pull tab, disconnect the battery cable from the connector (BATT) on the system board. 2. Unroute the battery cable from the routing channels between the system board and battery. 3.

  • Page 48: Battery Cable

    Figure 21. Installing the battery Steps 1. Align and place the battery in the slot on the palm-rest assembly. 2. Replace the three (M2x4) screws to secure the battery to the palm-rest assembly. 3. Route the battery cable through the routing channels between the system board and battery. 4.

  • Page 49: Installing The Battery Cable

    Figure 22. Removing the battery cable Steps Disconnect the battery cable from the connector on the battery. Installing the battery cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the battery cable and provides a visual representation of the installation procedure.

  • Page 50: Keyboard

    Figure 23. Installing the battery cable Steps Connect the battery cable to the connector on the battery. Next steps 1. Install the battery. 2. Install the base cover. 3. Follow the procedure in After working inside your computer. Keyboard Removing the keyboard Prerequisites 1.
  • Page 51 Figure 24. Removing the keyboard Removing and installing Field Replaceable Units (FRUs)

  • Page 52: Installing The Keyboard

    Figure 25. Removing the keyboard Steps 1. Unroute the battery cable from the routing channels between the system board and battery. 2. Push the release tabs and disconnect the keyboard cable from the connector (KB) on the system board. 3. Turn the computer over and open the display to an angle of 180 degrees with the keyboard facing up. 4.
  • Page 53 Figure 26. Installing the keyboard Removing and installing Field Replaceable Units (FRUs)

  • Page 54: I/O-Board Cable

    Figure 27. Installing the keyboard Steps 1. Carefully insert the keyboard cable through the gap on the palm-rest assembly. 2. Align and place the keyboard on the palm-rest assembly. 3. Gently press the keyboard and snap it into place. 4. Close the display completely and turn the computer over. 5.

  • Page 55: Installing The I/O-Board Cables (24-Pin And 50-Pin)

    Figure 28. Removing the I/O-board cables (24-pin and 50-pin) Steps 1. Lift the cable-connector latch and disconnect the 24-pin I/O-board cable from the connector on the system board. 2. Lift the cable-connector latch and disconnect the 24-pin I/O-board cable from the connector on the I/O board. 3.

  • Page 56: I/O Board

    Figure 29. Installing the I/O-board cables (24-pin and 50-pin) Steps 1. Connect the 24-pin I/O-board cable to the connector on the system board and press down the cable-connector latch to secure the cable in place. 2. Connect the 24-pin I/O-board cable to the connector on the I/O board and press down the cable-connector latch to secure the cable in place.
  • Page 57 Figure 30. Removing the I/O board Steps 1. Lift the cable-connector latch and disconnect the 24-pin I/O-board cable from the connector on the I/O board. 2. Lift the cable-connector latch and disconnect the 50-pin I/O-board cable from the connector on the I/O board. 3.

  • Page 58: Installing The I/O Board

    Figure 31. Type-C brackets not to be removed 5. Remove the four (M2x4) screws that secure the I/O board in place. 6. Slide and remove the I/O board from the computer. Installing the I/O board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the I/O board and provide a visual representation of the installation procedure.
  • Page 59 Figure 32. Installing the I/O board Steps 1. Align and place the I/O board on the palm-rest assembly. 2. Replace the four (M2x4) screws to secure the I/O board in place. 3. Align and place the Type-C bracket on the I/O board. 4.

  • Page 60: Speakers

    2. Install the SIM card (for computers that are shipped with WWAN antennas). 3. Install the base cover. 4. Follow the procedure in After working inside your computer. Speakers Removing the speakers Prerequisites 1. Follow the procedure in Before working inside your computer.
  • Page 61 Figure 33. Removing the speakers Steps 1. Peel back the transparent tape that secures the speaker cable to the palm-rest. 2. Disconnect the speaker cable from the connector (SPEAKER) on the system board. 3. Peel the three pieces of adhesive tape that secure the speaker cable to the palm-rest. 4.

  • Page 62: Installing The Speakers

    Installing the speakers Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the speakers and provides a visual representation of the installation procedure. Figure 34.

  • Page 63: System Board

    NOTE: The speaker cable must be routed through the routing channels at the bottom of the palm-rest to avoid damaging the speaker cable when installing the base cover. 3. Adhere the three pieces of adhesive tape to secure the speaker cable on the palm-rest. 4.
  • Page 64 1. WLAN card (WL1) connector 2. Display cable (EDP) connector 3. Speaker cable (SPEAKER) connector 4. Battery cable (BATT) connector 5. Keyboard cable (KB) connector 6. Touchpad cable (TP) connector 7. 50-pin I/O-board connector 8. 24-pin I/O-board connector The following images indicate the location of the system board and provide a visual representation of the removal procedure. Figure 36.
  • Page 65 Figure 37. Removing the system board Steps 1. Unroute the battery cable from the routing channels between the system board and battery. 2. Remove the (M2x3) screw that secures the WLAN card bracket to the WLAN card module on the system board. 3.
  • Page 66 NOTE: Do not remove the Type-C brackets located underneath the I/O board or system board. Figure 38. Type-C brackets not to be removed 13. Carefully lift and remove the system board from the left side of the palm-rest assembly. NOTE: Lifting the system board from another side can damage components that are connected to the palm-rest.

  • Page 67: Installing The System Board

    Installing the system board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the connectors on your system board. Figure 40. System board connectors 1. WLAN card (WL1) connector 2.
  • Page 68 Figure 41. Installing the system board Removing and installing Field Replaceable Units (FRUs)
  • Page 69 Figure 42. Installing the system board NOTE: If the thermal pad on the palm-rest underneath the system board gets detached, adhere it back on the palm-rest. Steps 1. Place the system board on the palm-rest assembly. 2. Align the screw holes on the system board with the screw holes on the palm-rest assembly. 3.

  • Page 70: Display Assembly

    Display assembly Removing the display assembly Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the WWAN card(for computers that are shipped with WWAN card). About this task The following images indicate the location of the display assembly and provide a visual representation of the removal procedure. Figure 43.
  • Page 71 Figure 44. Removing the display assembly Removing and installing Field Replaceable Units (FRUs)

  • Page 72: Installing The Display Assembly

    Figure 45. Display assembly Steps 1. Remove the (M2x3) screw that secures the WLAN card bracket to the WLAN card module on the system board. 2. Remove the WLAN card bracket from the WLAN card module that secures the two antenna cables. 3.
  • Page 73 Figure 46. Installing the display assembly Removing and installing Field Replaceable Units (FRUs)
  • Page 74 Figure 47. Installing the display assembly Removing and installing Field Replaceable Units (FRUs)
  • Page 75 Figure 48. Installing the display assembly Steps 1. Place the palm-rest assembly on a flat surface. 2. Align the display assembly such that the screw holes on the display hinges align with the screw holes on the palm-rest assembly. 3. Replace the six (M2.5x5) screws to secure the display assembly to the palm-rest assembly. 4.

  • Page 76: Display Bezel

    Display bezel Removing the display bezel Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the WWAN card (for computers that are shipped with a WWAN card). 4. Remove the display assembly.
  • Page 77 Figure 50. Removing the display bezel Steps 1. Using a plastic scribe, peel the stickers that cover the display bezel screws. NOTE: A new set of stickers is included with a replacement display bezel. When replacing the new display bezel, adhere the new stickers over the screws once the screws have been secured.
  • Page 78 Figure 51. Peel the four bezel stickers 2. Remove the four (M2.5x3.8) screws that secure the display bezel to the display assembly. 3. Using a plastic scribe, carefully pry open the two recesses along the bottom side of the display bezel near the hinge caps. Removing and installing Field Replaceable Units (FRUs)
  • Page 79 Figure 52. Pry the display bezel from the two recesses near the hinge caps 4. Using a plastic scribe, continue to pry open the outside edges at the bottom side of the display bezel. NOTE: Carefully pry the display bezel as peeling the adhesive on the display bezel can damage the display panel. 5.
  • Page 80 Figure 53. Prying the display bezel at bottom edges 6. Pry open the outside edges of the left, right, and top sides of the display bezel. Removing and installing Field Replaceable Units (FRUs)
  • Page 81 Figure 54. Prying the display bezel from the left and right sides Removing and installing Field Replaceable Units (FRUs)
  • Page 82 Figure 55. Prying the display bezel from the top side 7. Remove the display bezel from the display assembly. Removing and installing Field Replaceable Units (FRUs)

  • Page 83: Installing The Display Bezel

    Figure 56. Remove the display bezel Installing the display bezel Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the display bezel and provide a visual representation of the installation procedure. Removing and installing Field Replaceable Units (FRUs)
  • Page 84 Figure 57. Installing the display bezel Removing and installing Field Replaceable Units (FRUs)

  • Page 85: Display Panel

    Figure 58. Installing the display bezel Steps 1. Align and place the display bezel on the display assembly. 2. Starting from the top corner, press on the display bezel and work around the entire bezel until it clicks onto the display assembly.
  • Page 86 2. Remove the base cover. 3. Remove the WWAN card (for computers that are shipped with a WWAN card). 4. Remove the display assembly. 5. Remove the display bezel. About this task The following images indicate the location of the display panel and provide a visual representation of the removal procedure. Figure 59.
  • Page 87 Figure 60. Removing the display panel Removing and installing Field Replaceable Units (FRUs)

  • Page 88: Installing The Display Panel

    Figure 61. Display panel Steps 1. Peel the conductive tape that secures the display panel in place at the bottom-left side of the display panel. 2. Remove the four (M2x3) screws that secure the display panel to the display assembly. 3.
  • Page 89 Figure 62. Installing the display panel Removing and installing Field Replaceable Units (FRUs)
  • Page 90 Figure 63. Installing the display panel Removing and installing Field Replaceable Units (FRUs)

  • Page 91: Front-Facing Camera

    Figure 64. Installing the display panel Steps 1. Connect the display cable to the connector on the back of the display panel. 2. Adhere the rubber spacer on the display cable. 3. Adhere the transparent tape on the display cable connector. 4.

  • Page 92: Installing The Front-Facing Camera

    3. Remove the WWAN card (for computers that are shipped with a WWAN card). 4. Remove the display assembly. 5. Remove the display bezel. About this task The following image indicates the location of the front-facing camera and provides a visual representation of the removal procedure.

  • Page 93: Display Hinges

    Figure 66. Installing the front-facing camera Steps 1. Align and place the camera module into the slot on the display assembly. 2. Gently press the camera module until it clicks into place. 3. Adhere the foil tape to secure the camera module. 4.

  • Page 94: Installing The Display Hinges

    Figure 67. Removing the display hinges Steps 1. Peel back the conductive tape that secures the display cable to the left-display hinge. 2. Remove the two (M2x3) screws and the four (M2.5x2.5) screws that secure the display hinges to the display back-cover. 3.
  • Page 95 Figure 68. Installing the display hinges Steps 1. Align the screw holes on the display hinges with the screw holes on the display back-cover. 2. Replace the two (M2x3) screws and the four (M2.5x2.5) screws to secure the display hinges to the display back-cover. 3.

  • Page 96: Display Cable

    Display cable Removing the display cable Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the WWAN card (for computers that are shipped with a WWAN card). 4. Remove the display assembly.

  • Page 97: Installing The Display Cable

    Steps 1. Peel back the conductive tape from the left-display hinge that secures the display cable in place. 2. Disconnect the display cable from the connector on the camera module. 3. Peel back the conductive tape that secures the display cable in place. 4.

  • Page 98: Display Back-Cover And Antenna Assembly

    2. Route the display cable through the routing channel on the display back cover. 3. Adhere the conductive tape to secure the display cable in place. 4. Connect the display cable to the connector on the camera module. 5. Adhere the conductive tape on the left-display hinge to secure the display cable in place. Next steps 1.

  • Page 99: Installing The Display Back-Cover And Antenna Assembly

    Figure 71. Removing the display back cover and antenna assembly NOTE: The display back cover and antenna assembly cannot be further disassembled once all the components in the prerequisite steps have been removed. If the WLAN and/or WWAN antenna cables are malfunctioning and are required to be replaced, replace the entire display back cover and antenna assembly.

  • Page 100: Palm-Rest Assembly

    Figure 72. Installing the display back-cover and antenna assembly Steps Place the display back-cover and antenna assembly on a flat surface and install the components listed in Next steps to complete the display back-cover and antenna assembly. Next steps 1. Install the display cable.

  • Page 101: Installing The Palm-Rest Assembly

    5. Remove the keyboard. 6. Remove the I/O-board cables (24-pin and 50-pin). 7. Remove the board. 8. Remove the display assembly. 9. Remove the system board. 10. Remove the speakers. About this task The following image shows the palm-rest assembly after all the components in the prerequisite steps have been removed. Figure 73.
  • Page 102 Figure 74. Installing the palm-rest assembly NOTE: If the thermal pad on the palm-rest underneath the system board gets detached, adhere it back onto the palm-rest. Steps Place the palm-rest assembly on a flat surface and install the components that are listed in Next steps to complete the palm-rest installation.

  • Page 103: Chapter 7: Software

    Your Chromebook 3120 supports the following operating systems: ChromeOS Drivers and downloads When troubleshooting, downloading, or installing drivers, it is recommended that you read the Dell Knowledge Base article Drivers and Downloads FAQs 000123347. Frequently asked questions The following are frequently asked questions: Table 24.
  • Page 104 Table 24. Frequently asked questions (continued) Frequently asked questions Responses Why does my Chromebook need my You have to use your Google Account to sign in to your Chromebook. It is the same Google Account information? account that you use for Google services such as Gmail and Drive. Your Chromebook uses your account information to automatically sign you into apps and services.

  • Page 105: Chapter 8: Troubleshooting

    ● Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other computers with your computer.

  • Page 106: Chromebook Storage

    Failure to follow these steps could cause your batteries to reach a critically low charge when the Chromebook is stored for long periods of time, and can result in permanent failure of the battery. Dell provides a standard 1-year warranty on batteries.

  • Page 107: Preparing The Chromebook For Long-Term Storage

    Preparing the Chromebook for long-term storage Prerequisites Update your Chromebook to the latest version of the ChromeOS and charge so that the battery is at least 80% full. This ensures that even when the battery discharges while unplugged over the summer, power is not fully depleted. In order to slow the discharge rate during storage, use the same process that the factory uses before they ship devices.

  • Page 108: Wi-Fi Power Cycle

    6. Install the battery. 7. Install the base cover. 8. Connect the power adapter to the computer. 9. Turn on the computer. NOTE: For more information about performing a hard reset, search in the Knowledge Base Resource at the Dell Support Site. Troubleshooting...

  • Page 109: Chapter 9: Getting Help And Contacting Dell

    Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 25. Self-help resources  Self-help resources Resource location Information about Dell products and services Dell Site Tips Online help for operating system...

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