Dell Precision 7540 Service Manual
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Dell Precision 7540 Service Manual

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Dell Precision 7540
Service Manual
Regulatory Model: P74F
Regulatory Type: P74F002
August 2021
Rev. A02

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Summary of Contents for Dell Precision 7540

  • Page 1 Dell Precision 7540 Service Manual Regulatory Model: P74F Regulatory Type: P74F002 August 2021 Rev. A02...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2016-2021 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.

  • Page 3: Table Of Contents

    Contents Chapter 1: Working on your computer................... 6 Safety instructions................................6 Turning off your computer — Windows 10........................6 Before working inside your computer..........................7 After working inside your computer..........................7 Chapter 2: Technology and components..................8 HDMI 2.0....................................8 USB features..................................9 USB Type-C..................................
  • Page 4 Installing the M.2 SSD module..........................39 2.5" Hard drive..................................41 Removing the hard drive assembly.......................... 41 Installing the hard drive assembly........................... 42 Hard drive interposer board............................43 Removing the hard drive interposer board......................43 Installing the hard drive interposer board......................44 Coin-cell battery................................45 Removing the coin cell battery..........................
  • Page 5 Display bracket...................................92 Removing the display support bracket........................92 Installing the display support bracket........................93 Chapter 4: Troubleshooting......................95 Enhanced Pre-Boot System Assessment — ePSA diagnostics................95 Running the ePSA Diagnostics..........................95 Diagnostic LED...................................95 Battery status LED................................96 Chapter 5: Getting help.......................98 Contacting Dell.................................. 98 Contents...

  • Page 6: Chapter 1: Working On Your Computer

    Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

  • Page 7: Before Working Inside Your Computer

    CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell computers. 1. Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.

  • Page 8: Chapter 2: Technology And Components

    Technology and components This chapter details the technology and components available in the system. Topics: • HDMI 2.0 • USB features • USB Type-C HDMI 2.0 This topic explains the HDMI 2.0 and its features along with the advantages. HDMI (High-Definition Multimedia Interface) is an industry-supported, uncompressed, all-digital audio/video interface. HDMI provides an interface between any compatible digital audio/video source, such as a DVD player, or A/V receiver and a compatible digital audio and/or video monitor, such as a digital TV (DTV).

  • Page 9: Usb Features

    USB features Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplified the connection between host computers and peripheral devices like mice, keyboards, external drivers, and printers. Table 1. USB evolution Type Data Transfer Rate Category Introduction Year USB 2.0 480 Mbps High Speed...

  • Page 10: Usb Type-C

    With today's ever increasing demands placed on data transfers with high-definition video content, terabyte storage devices, high megapixel count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps theoretical maximum throughput, making data transfer at around 320 Mbps (40 MB/s) — the actual real-world maximum.
  • Page 11 Alternate Mode USB Type-C is a new connector standard that is very small. It is about a third the size of an old USB Type-A plug. This is a single connector standard that every device should be able to use. USB Type-C ports can support a variety of different protocols using “alternate modes,”...
  • Page 12 2. Thunderbolt 3 supports speed up to 40 Gbps 3. DisplayPort 1.4 – compatible with existing DisplayPort monitors, devices and cables 4. USB Power Delivery - Up to 130W on supported computers Key Features of Thunderbolt 3 over USB Type-C 1.

  • Page 13: Chapter 3: Removing And Installing Components

    Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Topics: • Recommended tools • Screw size list • SD card • Base cover • Battery • Keyboard • Primary memory module •...

  • Page 14: Screw Size List

    Screw size list Table 2. Precision 7540 Component Screw type Quantity Image M2.0x2.0 Keyboard M2.0x3.0 SSD thermal plate 1 per SSD M.2 SSD card 1 per SSD HDD Interposer board WLAN card WWAN eDP bracket Display panel Power button board...

  • Page 15: Installing Sd Card

    2. Press the SD card in to release it from the system. 3. Slide the SD card out of the system. Installing SD card 1. Slide the SD card into its slot until it clicks into place. Removing and installing components...

  • Page 16: Base Cover

    2. Follow the procedure in After working inside your computer. Base cover Removing the base cover 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. To remove the base cover: a. Loosen the 7 captive screws that secure the base cover to the system [1]. b.

  • Page 17: Installing The Base Cover

    NOTE: While pry open the base cover make sure to use hands or plastic scribe—do not use any other sharp objects as it may damage the chassis Installing the base cover 1. To install the base cover: a. Slide the base cover into its slot until it clicks into place [1, 2]. b.

  • Page 18: 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 lithium-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell.

  • Page 19: Removing The Battery

    Removing the battery 1. Follow the procedure in Before working inside your computer. 2. Remove the:. SD card base cover 3. To remove the 6-cell battery: a. Disconnect the battery cable from the connector on the battery [1]. b. Remove the 3 (M2.5x3.0) screws that secure the battery to the system [2]. c.

  • Page 20: Installing The Battery

    Installing the battery 1. To install the 6-cell battery: a. Place the battery onto its slot in the system [1]. b. Replace the 3 (M2.5x3.0) screws to secure the battery to the system [2]. c. Connect the battery cable to the connector in the battery [3]. Removing and installing components...
  • Page 21 2. To install the 4-cell battery: a. Place the battery onto its slot in the system [1]. b. Replace the 2 (M2.5x3.0) screws to secure the battery to the system [2]. c. Connect the battery cable to the connector in the system board [3]. Removing and installing components...

  • Page 22: Keyboard

    3. Install the: base cover SD card 4. Follow the procedure in After working inside your computer. Keyboard Removing the keyboard 1. Follow the procedures in Before working inside your computer. 2. Remove the: SD card base cover battery 3. To remove the keyboard: a.
  • Page 23 b. Turn-over and open the system at 90° angle. c. Using a plastic scribe pry the keyboard lattice starting from the recess points on the top edge [1,2] and work along the sides and bottom edge of the keyboard lattice. Removing and installing components...
  • Page 24 d. Lift the keyboard lattice away from the system. e. Remove the 6 (M2.0x2.0) screws that secure the keyboard to the palmrest [1]. f. Pry the bottom edge of the keyboard and then work along the left and right sides of the keyboard [2,3,4]. Removing and installing components...

  • Page 25: Installing The Keyboard

    g. Slide and remove the keyboard from the system. Installing the keyboard 1. To Install the keyboard: Removing and installing components...
  • Page 26 a. Align the keyboard and route the cables back through to the bottom of the compartment. b. Press and align the keyboard to its compartment working along the left, right and bottom edges [1,2,3]. c. Replace the 6 (M2.0x2.0) screws to secure the keyboard to the palmrest [4]. d.
  • Page 27 e. Turn-over the system at 90° angle to access the keyboard cables. f. Connect the keyboard cable, fingerprint cable and fingerprint button cable to the connectors on the system board. Removing and installing components...

  • Page 28: Primary Memory Module

    NOTE: Ensure that you fold the keyboard data cable in perfect alignment. 3. Install the: battery base cover SD card 4. Follow the procedure in After working inside your computer. Primary memory module Removing the primary memory module 1. Follow the procedure in Before working inside your computer.

  • Page 29: Installing The Primary Memory Module

    Installing the primary memory module 1. To Install the primary memory module: a. Insert the memory module into the memory socket [1]. b. Press the clips to secure the memory module to the system board [2]. c. Slide in the memory shield on the memory module [3]. d.

  • Page 30: Installing The Secondary Memory Module

    Installing the secondary memory module 1. To install the secondary memory module: a. Insert the memory module into the memory socket. b. Press the clips to secure the memory module to the system board. Removing and installing components...

  • Page 31: Wwan Card

    2. Install the: battery base cover SD card 3. Follow the procedure in After working inside your computer. WWAN card Removing WWAN card 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery 3.

  • Page 32: Installing The Wwan Card

    Installing the WWAN card 1. To install the WWAN card: a. Slide the WWAN card to the WWAN card slot on the system board [1]. b. Route the WWAN antenna cables through the routing channel. c. Connect the antenna cables to the connectors on the WWAN card [2]. d.

  • Page 33: Wlan Card

    2. Install the: battery base cover SD card 3. Follow the procedure in After working inside your computer. WLAN card Removing the WLAN card 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery 3.

  • Page 34: Installing The Wlan Card

    Installing the WLAN card 1. To install the WLAN card: a. Slide the WLAN card to the WLAN card slot in the system board [1]. b. Route the WLAN antenna cables through the routing channel. c. Connect the antenna cables to the connectors in the WLAN card [2]. d.

  • Page 35: Sim Card

    2. Install the: battery base cover SD card 3. Follow the procedure in After working inside your computer. SIM card Removing SIM card 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery 3.

  • Page 36: Installing Sim Card

    Installing SIM card 1. To install the SIM card: a. Slide the SIM card into the SIM card compartment [1]. b. Snap the SIM card cover down [2]. c. Slide the SIM card cover towards the front of the system to lock the SIM card cover [3]. Removing and installing components...

  • Page 37: Solid State Drive

    2. Install the: battery base cover SD card 3. Follow the procedure in After working inside your computer. Solid State Drive Removing the M.2 Solid State Drive—SSD module 1. Follow the procedures in Before working inside your computer. 2. Remove the: SD card base cover battery...
  • Page 38 Removing and installing components...

  • Page 39: Installing The M.2 Ssd Module

    Installing the M.2 SSD module 1. To install the M.2 SSD module (Slot 4): a. Place the M.2 SSD into its slot in the system [1]. b. Replace the single (M2.0x3.0) screw to secure the M.2 SSD to the system board [2]. c.
  • Page 40 Removing and installing components...

  • Page 41: 2.5" Hard Drive

    2. Install the: battery SD card 3. Follow the procedure in After working inside your computer. 2.5" Hard drive Removing the hard drive assembly 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery 3.

  • Page 42: Installing The Hard Drive Assembly

    c. Remove the hard drive assembly from the system. d. Remove the 4 (M3.0x3.0) screws that secure the hard drive assembly to the hard drive bracket. e. Remove the hard drive from the hard drive bracket. Installing the hard drive assembly 1.

  • Page 43: Hard Drive Interposer Board

    b. Insert the hard drive assembly into its slot in the system [1]. c. Replace the 4 (M2.5x3.0) screws to secure the hard drive assembly to the system [2]. 2. Install the: base cover SD card 3. Follow the procedure in After working inside your computer.

  • Page 44: Installing The Hard Drive Interposer Board

    base cover battery hard drive 3. To remove the hard drive interposer board: a. Remove the 2 (M2.0x3.0) screws that secure the hard drive interposer to the system board [1]. b. Remove the hard drive interposer board from the system [2]. Installing the hard drive interposer board 1.

  • Page 45: Coin-Cell Battery

    2. Install the: hard drive base cover SD card 3. Follow the procedure in After working inside your computer. Coin-cell battery Removing the coin cell battery 1. Follow the procedures in Before working inside your computer. 2. Remove the: SD card base cover battery palmrest...

  • Page 46: Installing The Coin Cell Battery

    CAUTION: Disconnecting coin cell battery may reset BIOS settings, time and date within System Settings, cause BitLocker or other security resets. Installing the coin cell battery 1. To install the coin cell battery: a. Replace the coin cell battery in its slot on the system. b.

  • Page 47: Power Connector Port

    2. Install the: palmrest battery base cover SD card 3. Follow the procedure in After working inside your computer. Power connector port Removing the power connector port 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery...
  • Page 48 c. Remove the single (M2.0x5.0) screw that secures the power connector cable metal bracket to the system [1]. d. Remove the metal bracket away from the system [2]. e. Lift the power connector port from the system [3]. Removing and installing components...

  • Page 49: Installing The Power Connector Port

    Installing the power connector port 1. To install the power connector port: a. Connect the power connector port to the system [1]. b. Place the power connector cable metal bracket [2]. c. Replace the single (M2.0x5.0) screw to secure the metal bracket to the system [3]. Removing and installing components...
  • Page 50 d. Affix the adhesive tape to secure the power connector cable in place [1]. e. Route the cable through the routing channel and affix the adhesive tape [2]. f. Connect the power connector cable to the connector on the system board [3]. Removing and installing components...

  • Page 51: Palm Rest

    2. Install the: battery base cover SD card 3. Follow the procedure in After working inside your computer. Palm rest Removing the palmrest 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery keyboard hard drive...
  • Page 52 c. Turn the system around and disconnect the system board cable and power button cable from the connectors on the system board [1, 2]. d. Remove the 2 (M2.0x3.0) screws that secure the palmrest to the system [3]. Removing and installing components...
  • Page 53 e. Push the hole at the bottom of the system to release the palmrest from the bottom chassis. f. Lift and remove the palmrest from the system. Removing and installing components...

  • Page 54: Installing The Palmrest

    Installing the palmrest 1. To install the palmrest: a. Align the palmrest on the system and press until it snaps in its place . b. Replace the 2 (M2.0x3.0) screws to secure the palmrest to the system [1]. c. Connect the system board and power button cable to the connectors on the system board [2,3]. Removing and installing components...
  • Page 55 d. Turn the system and replace the 2 (M2.0x3.0) and the 11 (M2.0x5.0) screws to secure the palmrest to the system [1, 2]. e. Connect the touchpad cable to the connector on the system board and lock the latch [3]. Removing and installing components...

  • Page 56: Touchpad Button

    2. Install the: keyboard hard disk battery base cover SD card 3. Follow the procedure in After working inside your computer. Touchpad button Removing the Touchpad buttons 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery...

  • Page 57: Installing The Touchpad Button

    Installing the Touchpad button 1. To install the touchpad button: a. Place the touchpad button into its slot in the palmrest [1]. b. Replace the 2 (M2.0x3.0) screws to secure the touchpad button to the palmrest [2]. c. Connect the touchpad button cable to the connector in the touchpad [3]. 2.

  • Page 58: Installing The Smart Card Cage

    3. To remove power switch board: a. Disconnect the smart card cage cable from the connector on the palmrest board [1]. b. Pry the smart card cage cable. c. Remove the 2 (M2.0X3.0) screws that secure the smart card cage to the palmrest [3]. d.

  • Page 59: Speaker

    2. Install the: palmrest hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Speaker Removing the speakers 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery keyboard...

  • Page 60: Installing The Speakers

    Installing the speakers 1. To install the speaker: a. Align the speakers along the slots on the system [1]. b. Route the speaker cable through the routing channels on the system. c. Connect the speaker cable to the connector on the system board [2]. Removing and installing components...

  • Page 61: Led Board

    2. Install the: palmrest hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. LED board Removing the LED board 1. Follow the procedures in Before working inside your computer. 2. Remove the: SD card base cover battery...

  • Page 62: Installing The Led Board

    d. Remove the LED board from the system [3]. Installing the LED board 1. To install the LED board: a. Align the LED board to its original position on the system [1]. b. Replace the single (M2.0x5.0) screw to secure the LED board to the system [2]. c.

  • Page 63: Heat Sink

    2. Install the: palmrest hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Heat sink Removing the heat sink assembly 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery...
  • Page 64 c. Disconnect the eDP cable from the connector on the system board [3]. d. Pry the adhesive tape that secures the eDP cable in place. e. Disconnect the two fan cables from the connector on the system board [4,5]. f. Loosen the 4 captive screws that secure the heat sink assembly to the system board [1]. NOTE: Remove the captive screws in the order stamped onto the heat sink next to the screws [1 >...
  • Page 65 h. Slide and remove the heat sink assembly from the system. Removing and installing components...

  • Page 66: Installing The Heat Sink Assembly

    Installing the heat sink assembly 1. To install the heat sink assembly: a. Insert the heat-sink assembly in its slot on the system [1]. b. Tighten the 4 captive screws to secure the heat-sink assembly to the system board [2]. NOTE: Tighten the captive screws in the order stamped onto the heat sink next to the screws [1 >...
  • Page 67 c. Connect the two fan cables to the connector on the system board [1, 2]. d. Affix the adhesive tape to secure the eDP cable in place. e. Connect the eDP cable to the connector on the system board [3]. f.

  • Page 68: Graphics Card

    2. Install the: palmrest hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Graphics card Removing the graphics card 1. Follow the procedure in Before working inside your computer. 2. Remove the: SD card base cover battery...

  • Page 69: Installing The Graphics Card

    c. Remove the 2 (M2.0x5.0) screws that secure the graphics card to the system board [3]. d. Remove the graphics card from the system [4]. NOTE: The above procedures are for UMA graphics card. Systems shipped with UMA GPU card do not have GPU power cable.

  • Page 70: System Board

    NOTE: The above procedures are for UMA graphics card. Systems shipped with UMA GPU card do not have GPU power cable. However, for discrete models shipped with either a 128 MB or 256 MB VRAM GPU card, you need to connect the GPU power cable after installing the GPU card.
  • Page 71 keyboard primary memory secondary memory WLAN card WWAN card M.2 SSD card SIM card palmrest heat sink assembly graphic card 3. To disconnect the system board: a. Disconnect the power connector cable from the connector on the system board . b.
  • Page 72 e. Remove the 3 (M2.0x5.0) screws that secure the system board in place [1]. f. Slide the system board to release the IO connectors from the opening on the top and left side of the system chassis to remove the system board from the system chassis [3, 2]. Removing and installing components...

  • Page 73: Installing The System Board

    Installing the system board 1. To install the system board: a. Align the system board into its original position on the system [1, 2]. b. Replace the 3 (M2.0x5.0) screws to secure the system board in place [3]. Removing and installing components...
  • Page 74 c. Connect the touchpad cable, LED board cable and speaker to the connectors on the system board [4, 3, 2] and affix the coin cell battery to the system [1]. d. Place the Type-C USB bracket onto its slot on the system [5]. e.
  • Page 75 f. Connect the power connector cable to the connector on the system board. Removing and installing components...

  • Page 76: Display Assembly

    2. Install the: graphic card heat sink assembly palmrest SIM card M.2 SSD card WWAN card WLAN card primary memory secondary memory keyboard hard drive interposer board hard drive battery base cover SD card 3. Follow the procedure in After working inside your computer.
  • Page 77 c. Remove the 2 (M2.5x6.0) screws at the rear of the system that secures the display assembly in place. Removing and installing components...
  • Page 78 d. Open the display assembly to a 180-degree angle. e. Remove the 4 (M2.5x4.0) screws that secures the display hinge caps to the system [1]. f. Remove the display hinge caps from the system [2]. g. Remove the 2 (M2.0x3.0) screws that secure the eDP cable bracket to the system board [1]. h.

  • Page 79: Installing The Display Assembly

    Installing the display assembly 1. To install display assembly: a. Align the display assembly into the slots on the system [1]. b. Route the wireless cable located next to the hinges [2]. c. Affix the adhesive tape to secure the eDP cable in place [3]. d.
  • Page 80 f. Align the display hinge caps and replace the 4 (M2.5x4.0) screws to secure the display hinge caps to the system [1, 2]. g. Close the display assembly and replace the 2 (M2.5x6.0) screws at the rear of the system to secure the display assembly in place.
  • Page 81 h. Route all the wireless antenna cables to the routing channels at the bottom of the system [1]. Replace the 2 (M2.5x4.0) screws at the bottom of the system to secure the display assembly in place [2]. Removing and installing components...

  • Page 82: Display Bezel

    2. Install the: palmrest WWAN card WLAN card hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Display bezel Removing the display bezel 1. Follow the procedure in Before working inside your computer.

  • Page 83: Installing The Display Bezel

    WWAN card WLAN card palmrest display assembly 3. To remove display bezel: a. Using a plastic scribe pry the two recess points at the bottom edge of the display bezel [1]. b. Pry around the sides and top edge of the display bezel [2, 3, 4]. NOTE: While prying the display bezel, make sure to pry along the outside edge of the display bezel using your hands-using a screw driver or other sharp objects may damage the display cover.

  • Page 84: Display Panel

    2. Install the: display assembly palmrest WWAN card WLAN card hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Display panel Removing the display panel 1. Follow the procedure in Before working inside your computer.

  • Page 85: Installing The Display Panel

    a. Remove the 4 (M2.0X3.0) screws that secure the display panel to the display assembly [1]. b. Lift the display panel and turn the display panel over to access the eDP cable [2]. 4. To remove display panel: a. Peel the adhesive tape to access the eDP cable [1]. b.

  • Page 86: Display Hinges

    2. Install the: display bezel display assembly palmrest WWAN card WLAN card hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Display hinges Removing the display hinge 1. Follow the procedure in Before working inside your computer.

  • Page 87: Installing The Display Hinge

    palmrest display assembly display bezel display panel 3. To remove display hinge: a. Remove the 6 (M2.5x3.5) screws that secure the display hinges to the display assembly [1]. b. Remove the display hinges [2]. Installing the display hinge 1. To install display hinge: a.

  • Page 88: Camera

    2. Install the: display panel display bezel display assembly palmrest WWAN card WLAN card hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Camera Removing the camera 1. Follow the procedure in Before working inside your computer.

  • Page 89: Installing The Camera

    display assembly display bezel display panel 3. To remove camera: a. Peel the adhesive tape that covers the camera module [1]. b. Disconnect the eDP cable from the camera module [2]. c. Carefully pry the camera module from the system [3]. Installing the camera 1.

  • Page 90: Edp Cable

    2. Install the: display panel display bezel display assembly palmrest WWAN card WLAN card hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. eDP cable Removing the eDP cable 1. Follow the procedure in Before working inside your computer.

  • Page 91: Installing The Edp Cable

    palmrest display assembly display bezel display panel 3. To remove eDP cable: a. Peel the adhesive tape covering the camera module [1]. b. Disconnect the eDP cable from the camera module [2]. c. Peel the eDP cable from the display cover and unroute the cable from the routing channels [3]. d.

  • Page 92: Display Bracket

    2. Install the: display panel display bezel display assembly palmrest WWAN card WLAN card hard drive keyboard base cover battery SD card 3. Follow the procedure in After working inside your computer. Display bracket Removing the display support bracket 1. Follow the procedure in Before working inside your computer.

  • Page 93: Installing The Display Support Bracket

    palmrest display assembly display bezel display panel display hinge 3. To remove display bracket: a. Peel the adhesive tape that covers the display support bracket [1]. b. Remove the 6 (M2.0x3.0) screws that secure the display support brackets to the display cover [2]. c.
  • Page 94 2. Install the: display hinge display panel display bezel display assembly palmrest WWAN card WLAN card hard drive keyboard battery base cover SD card 3. Follow the procedure in After working inside your computer. Removing and installing components...

  • Page 95: Chapter 4: Troubleshooting

    Invoke diagnostics boot by either of the methods that are suggested below: 1. Power on the computer. 2. As the computer boots, press the F12 key when the Dell logo is displayed. 3. In the boot menu screen, use Up/Down arrow key to select the Diagnostics option and then press Enter.

  • Page 96: Battery Status Led

    NOTE: The diagnostic pattern consists of a two-digit number being represented by a first group of LED blinks (1–9) in amber, followed by a 1.5 s pause with the LED off, and then a second group of LED blinks (1–9) in white. This is then followed by a three second pause, with the LED off, before repeating over again.
  • Page 97 Table 4. Battery status LED (continued) Power Source LED behavior System Power State Battery Charge Level Battery S4/S5 0-100% ● S0 (ON) — System is turned on. ● S4— The system consumes the least power compared to all other sleep states. The system is almost at an OFF state, expect for a trickle power.

  • Page 98: Chapter 5: Getting Help

    Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues: 1. Go to Dell.com/support.

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