Chapter 1: Working on your computer............................................................................................7
Turning off your — Windows........................................................................................................................................... 7
Turning off your computer — Windows 8.....................................................................................................................7
Turning off your computer — Windows 7.....................................................................................................................7
Before working inside your computer.............................................................................................................................8
After working inside your computer................................................................................................................................9
Chapter 2: Disassembly and reassembly.......................................................................................10
Base cover........................................................................................................................................................................... 13
Removing base cover.................................................................................................................................................. 13
Installing base cover.................................................................................................................................................... 14
PCIe Solid State Drive (SSD)..........................................................................................................................................16
LED board............................................................................................................................................................................23
Contents3
Removing LED board.................................................................................................................................................. 23
Installing LED board.................................................................................................................................................... 24
Power connector port...................................................................................................................................................... 28
Removing power connector port.............................................................................................................................28
Installing power connector port...............................................................................................................................29
Removing the display panel (nontouch)................................................................................................................ 34
Installing the display panel (nontouch)...................................................................................................................37
Camera Microphone Module........................................................................................................................................... 37
Display Hinge Caps........................................................................................................................................................... 39
Removing the display hinge cap.............................................................................................................................. 39
Installing the display hinge cap.................................................................................................................................39
System board..................................................................................................................................................................... 40
Removing system board............................................................................................................................................ 40
Installing system board...............................................................................................................................................45
Keyboard lattice and Keyboard...................................................................................................................................... 45
System setup options....................................................................................................................................................... 51
General screen options..................................................................................................................................................... 51
System Configuration screen options.......................................................................................................................... 52
Power management screen options............................................................................................................................. 56
POST behavior screen options.......................................................................................................................................57
Virtualization support screen options...........................................................................................................................58
System logs........................................................................................................................................................................ 59
Updating the BIOS in Windows .................................................................................................................................... 60
Updating BIOS using USB flash drive.......................................................................................................................... 60
System and setup password.......................................................................................................................................... 60
Assigning a system setup password........................................................................................................................61
Deleting or changing an existing system setup password..................................................................................61
Chapter 4: System specifications................................................................................................ 62
System specifications.......................................................................................................................................................63
Video specifications.......................................................................................................................................................... 63
AC adapter specifications............................................................................................................................................... 65
Port and connector specifications................................................................................................................................ 65
Communication specifications....................................................................................................................................... 66
Camera specifications......................................................................................................................................................66
System setup options........................................................................................................................................................71
General screen options..................................................................................................................................................... 71
System Configuration screen options.......................................................................................................................... 72
Power management screen options............................................................................................................................. 76
POST behavior screen options.......................................................................................................................................77
Virtualization support screen options...........................................................................................................................78
System logs.........................................................................................................................................................................79
Updating the BIOS in Windows .................................................................................................................................... 80
System and setup password...........................................................................................................................................80
Assigning a system setup password....................................................................................................................... 80
Deleting or changing an existing system setup password..................................................................................81
Enhanced Pre-Boot System Assessment — ePSA diagnostics............................................................................ 82
Running the ePSA Diagnostics.................................................................................................................................82
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer .
1. Click or tap .
1
2. Click or tap and then click or tap Shut down.
NOTE:
Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them off.
Turning off your computer — Windows 8
CAUTION:
computer.
1. Turning off your computer:
● In Windows 8 (using a touch enabled device):
a. Swipe in from the right edge of the screen, opening the Charms menu and select Settings.
b. Tap and then tap Shut down
● In Windows 8 (using a mouse):
a. Point to upper-right corner of the screen and click Settings.
b. Click
2. Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds to
turn them off.
To avoid losing data, save and close all open files and exit all open programs before you turn off your
and then click Shut down.
Turning off your computer — Windows 7
CAUTION:
computer.
1. Click Start.
2. Click Shut Down.
To avoid losing data, save and close all open files and exit all open programs before you turn off your
Working on your computer7
NOTE: Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them off.
Before working inside your computer
1. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
2. Turn off your computer.
3. If the computer is connected to a docking device (docked), undock it.
4. Disconnect all network cables from the computer (if available).
CAUTION: If your computer has an RJ45 port, disconnect the network cable by first unplugging the cable
from your computer.
5. Disconnect your computer and all attached devices from their electrical outlets.
6. Open the display.
7. Press and hold the power button for few seconds, to ground the system board.
CAUTION: To guard against electrical shock unplug your computer from the electrical outlet before
performing Step # 8.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by
periodically touching an unpainted metal surface at the same time as touching a connector on the back
of the computer.
8. Remove any installed ExpressCards or Smart Cards from the appropriate slots.
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless
otherwise noted, each procedure included in this document assumes that the following conditions exist:
● You have read the safety information that shipped with your computer.
● A component can be replaced or, if purchased separately, installed by performing the removal procedure in the reverse
order.
NOTE:
Disconnect all power sources before opening the computer cover or panels. After you finish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
NOTE: Before working inside your computer, read the safety information that shipped with your computer. For additional
safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. 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.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically
touching an unpainted metal surface that is grounded to ground yourself before you touch the computer to
perform any disassembly tasks.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a
card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by
its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some
cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking
tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending
8Working on your computer
any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and
aligned.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
After working inside your computer
After you complete any replacement procedure, ensure that you connect external devices, cards, and cables before turning on
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.
2. Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the
computer.
3. Connect your computer and all attached devices to their electrical outlets.
4. Turn on your computer.
Working on your computer9
Topics:
•Recommended tools
Screw size list
•
•Subscriber Identification Module (SIM) card
•Base cover
•Battery
•PCIe Solid State Drive (SSD)
•Speaker
•Coin-cell battery
•WWAN card
•WLAN card
•Memory modules
•Heat sink
•LED board
•Smart card module
•Touchpad
•Power connector port
•Display Assembly
•Touch display panel
•Display Bezel
•Nontouch display panel
•Camera Microphone Module
•Display Hinge Caps
•Removing dummy SIM card tray
•System board
•Keyboard lattice and Keyboard
•Palm rest
2
Disassembly and reassembly
Recommended tools
The procedures in this document require the following tools:
● Phillips #0 screwdriver
● Phillips #1 screwdriver
● Small plastic scribe
Screw size list
Table 1. Latitude 7480 - Screw size list
ComponentM2.5x 6.0M2.5x5.0 M2.0 x 5.0
Back cover8 (captive screw)
Battery (3-cell)1
Battery (4-cell)2
SSD module1
10Disassembly and reassembly
M2.5 x
4.0
M2.0x3.0M2.0 x 2.5M2.0 x 2.0
Table 1. Latitude 7480 - Screw size list (continued)
ComponentM2.5x 6.0M2.5x5.0 M2.0 x 5.0
Heat sink module4
System fan22
WWAN card1
WLAN card1
Power connector port1
ESD bracket2
EDP bracket1
Touchpad buttons2
Fingerprint reader1
LED board1
Smart card reader cage2
Display hinge6
Display panel
Keyboard support plate18
Keyboard5
M2.5 x
4.0
M2.0x3.0M2.0 x 2.5M2.0 x 2.0
●FHD - 2
●HD - 4
System board3
Subscriber Identification Module (SIM) card
Removing SIM card or SIM card tray
NOTE:
SIM card or SIM card tray removal is only available on systems that are shipped with WWAN module. Hence,
removing procedure is only applicable for systems that are shipped with WWAN module.
CAUTION: Removing the SIM card when the computer is On, may cause data loss or damage the card. Ensure
that your computer is turned off or the network connections are disabled.
1. Insert a paperclip or a SIM card removal tool into the pinhole on the SIM card tray [1].
2. Use a scribe to pull the SIM card tray
3. Remove the SIM card, if a SIM card is available from the SIM card tray.
Disassembly and reassembly
11
Replacing SIM card
1. Insert a paperclip or a SIM card removal tool into the pinhole on the SIM card tray.
2. Use a scribe to pull the SIM card tray
3. Place on the SIM card on the tray.
4. Insert the SIM card tray into the slot.
Removing dummy SIM card tray
For models shipped with a WWAN card, the SIM card tray must first be removed from the system before removing the system
board. To remove the SIM card tray from the system follow the steps outlined in the disassembly section.
NOTE:
For models shipped with a wireless card only, a dummy SIM card tray must first be removed from the system before
removing the system board. The following are the steps for removing the dummy SIM card tray:
1. Push the release latch on the SIM card slot inwards.
2. Slide the dummy SIM card tray out of the system.
12
Disassembly and reassembly
Base cover
Removing base cover
1. Follow the procedure in Before working inside your computer.
2. To release the base cover:
a. Loosen the M2.5 x 6 captive screws (8) that secure the base cover to the computer [1].
NOTE: Exercise caution when loosening the screws. Angle the screwdriver to match the head of the front corners
of screw, to avoid a possible stripped screw head.
b. Use a plastic scribe to release the base cover from the edge and lift it from the computer [2].
CAUTION: Exercise caution when loosening the screws. Angle the screwdriver to match the head of the
screw (front corners on the laptop base cover) to avoid a possible stripped screw head.
3. Lift the base cover from the computer.
Disassembly and reassembly
13
Installing base cover
1. Align the base cover tabs to the slots on the edges of the computer.
2. Press the edges of the cover until it clicks into place.
3. Tighten the M2.5 x 6.0 captive screws to secure the base cover to the computer.
NOTE:
Exercise caution when tightening the screws. Angle the screw driver to match the head of the screw to avoid a
possible stripped screw head.
4. Follow the procedure in After working inside your computer.
Battery
Lithium-ion battery precautions
CAUTION:
● Exercise caution when handling Lithium-ion batteries.
● Discharge the battery completely before removing it. Disconnect the AC power adapter from the system and
operate the computer solely on battery power—the battery is fully discharged when the computer no longer
turns on when the power button is pressed.
● Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
● Do not expose the battery to high temperatures, or disassemble battery packs and cells.
● Do not apply pressure to the surface of the battery.
● Do not bend the battery.
● Do not use tools of any kind to pry on or against the battery.
14Disassembly and reassembly
● Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental
puncture or damage to the battery and other system components.
● 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.
● Always purchase genuine batteries from www.dell.com or authorized Dell partners and resellers.
Removing battery
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. To remove the battery:
a. Disconnect the battery cable from the connector on the system board [1].
b. Remove the M2.0 x 5.0 screws that secure the battery to the computer [2].
NOTE: A 3-cell battery has a single screw, and a 4-cell battery has two screws. Hence, the image displayed below is
a 4-cell battery.
c. Lift the battery from the computer [3].
Installing battery
1. Insert the battery into the slot on the computer.
2. Route the battery cable through the routing clip and connect the battery cable to the connector on the system board.
NOTE: Route the battery cable, if the cable at the base of the battery is un routed.
3. Tighten the M2.0 x 5.0 screws to secure the battery to the computer.
Disassembly and reassembly
15
NOTE: A small battery (3-cell) has a single screw, a larger battery (4-cell) has two screws.
4. Install the base cover
5. Follow the procedure in After working inside your computer.
PCIe Solid State Drive (SSD)
Removing PCIe SSD
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the PCIe SSD:
a. Loosen the M2 x3 captive screw that secures the SSD bracket [1].
b. Remove the SSD bracket [2].
c. Remove the PCIe SSD from the connector on the system board [3].
Installing PCIe SSD
1. Insert the PCIe SSD card into the connector.
2. Install the SSD bracket over the PCIe SSD card.
16
Disassembly and reassembly
NOTE: When installing the SSD bracket, ensure that the tab on the bracket is held securely with the tab on the palm
rest.
NOTE: Ensure to install the bracket is the system is shipped with bracket.
3. Tighten the M2 x 3 screws to secure it the SSD bracket.
4. Connect the battery cable to the connector on the system board.
5. Install the base cover.
6. Follow the procedure in After working iinside your computer.
Speaker
Removing speaker module
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To release the speaker module:
a. Push to disconnect the speaker cable from the connector on the system board [1].
NOTE: Ensure to unroute the speaker cable from the routing clip.
NOTE: Use a plastic scribe to release the cable from the connector. Do not pull the cable as it may result in
breakage.
b. Un-route the speaker cable from the routing clips [2].
c. Remove the tape that secures the speaker cables to the touchpad board [3].
5. To remove the speaker module:
Disassembly and reassembly
17
a. Remove the M2.0x3.0 screws (4) that secure the speaker module to the computer [1].
b. Lift the speaker module from the computer .
NOTE: Ensure to un-route the speaker cable from the routing clips.
Installing speaker module
1. Place the speaker module into the slots on the computer.
2. Route the speaker cable through the retention clips on the computer.
3. Connect the speaker cable to the connector on the system board.
4. Connect the battery cable to the connector on the system board.
5. Install the base cover.
6. Follow the procedure in After working inside your computer.
Coin-cell battery
Removing the coin cell battery
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the coin cell battery:
a. Disconnect the coin cell battery cable from the connector on the system board [1].
b. Lift the coin cell battery to release it from the adhesive [2].
18
Disassembly and reassembly
Installing coin cell battery
1. Affix the coin cell battery on the slot inside the computer.
2. Route the coin cell battery cable through the routing channel before connecting the cable.
3. Connect the coin cell battery cable to the connector on the system board.
4. Connect the battery cable to the connector on the system board.
5. Install the base cover.
6. 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 base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the WWAN card:
a. Remove the M2.0 x 3.0 screw that secures the metal bracket to the WWAN card .
b. Lift the metal bracket that secures the WWAN card .
c. Disconnect the WWAN cables from the connectors on the WWAN card with a plastic scribe..
d. .
Disassembly and reassembly
19
Installing WWAN card
1. Insert the WWAN card into the connector on the system board.
2. Connect the WWAN cables to the connectors on the WWAN card.
3. Place the metal bracket and tighten the M2.0 x 3.0 screw to secure it to the computer.
4. Connect the battery cable to the connector on the system board.
5. Install the base cover.
6. Follow the procedure in After working inside your computer.
NOTE: The IMEI number can also be found on the WWAN card.
WLAN card
Removing WLAN card
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the WLAN card:
a. Remove the M2.0 x 3.0 screw that secures the metal bracket to the WLAN card [1].
b. Lift the metal bracket [2].
c. Disconnect the WLAN cables from the connectors on the WLAN card [3].
d. Remove the WLAN card from the computer [4].
20
Disassembly and reassembly
NOTE: Ensure NOT to pull the WLAN card more than 35°, to avoid damage to pin.
Installing WLAN card
1. Insert the WLAN card into the connector on the system board.
2. Connect the WLAN cables to the connectors on the WLAN card.
3. Place the metal bracket and tighten the M2.0 x 3.0 screw to secure it to the computer.
4. Connect the battery cable to the connector on the system board.
5. Install the .base cover.
6. Follow the procedure in After working inside your computer.
Memory modules
Removing memory module
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the memory module:
a. Pull the clips securing the memory module until the module snaps-out [1].
b. Remove the memory module from the connector on the system board [2].
Disassembly and reassembly
21
Installing memory module
1. Insert the memory module into the connector until snaps in.
2. Connect the battery cable to the connector on the system board.
3. Install the base cover.
4. Follow the procedures in After working inside your computer.
Heat sink
Removing heat sink assembly
Heat sink assembly consists of heat sink and the system fan.
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the heat sink assembly:
NOTE: To identify the number of screws, see screw list.
a. Disconnect the fan cable from the system board [1].
NOTE: After removing the heat sink assembly, ensure to disconnect the fan cable.
b. Remove the M2.0 x 5.0 screws that secure the heat sink assembly to the system board [2].
22
Disassembly and reassembly
NOTE: Remove the screws in the order of the callout numbers [1, 2, 3, 4] as indicated on the heat sink.
c. Lift the heat sink assembly from the system board [3].
Installing heat sink assembly
Heat sink assembly consists of heat sink and the system fan.
1. Align the heat sink assembly with screw holders on the system board .
2. Tighten the M2.0 x 3.0 screws to secure the heat sink assembly to the system board.
NOTE: Tighten the screws in the order of the callout numbers [1, 2, 3, 4] as indicated on the heat sink.
3. Connect the fan cable to the connector on the system board.
4. Connect the battery cable to the connector on the system board.
5. Install the base cover.
6. Follow the procedure in After working inside your computer.
LED board
Removing LED board
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. To remove the LED board:
a. Disconnect the LED cable from the LED board [1].
Disassembly and reassembly
23
CAUTION: Avoid pulling the cable as it would result in breaking the cable connector. Instead, use a scribe
to push the edges of the cable connector to release the LED cable.
b. Remove the M2.0 x 3.0 screw that secures the LED board to the computer [2].
c. Lift the LED board from the computer [3].
Installing LED board
1. Insert the LED board into the slot on the computer.
2. Tighten the M2.0 x 3.0 screw to secure the LED board.
3. Connect the LED cable to the system board.
4. Connect the battery cable to the connector on the system board.
5. Install the base cover.
6. Follow the procedure in After working inside your computer.
Smart card module
Removing smart card cage
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Disconnect the battery cable from the connector on the system board.
4. Remove the PCIe SSD card .
5. To disconnect the smart card cable:
24
Disassembly and reassembly
a. Disconnect the smart card cable [1].
NOTE: Ensure to gently push the connector, to avoid damage to the smart card head.
b. Lift the smart card cable that is affixed to the touchpad module [2].
NOTE: Ensure to pull gently to release it with adhesive tape.
6. To remove the smart card cage:
NOTE: To identify the number of screws, see screw list.
a. Remove the M2 x 3 screws (2) that secure the smart card cage to the computer [1].
b. Slide and lift the smart card cage from the computer [2].
Disassembly and reassembly
25
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