- Notes, cautions, and warnings
- Views of Latitude 5455
- Set up your Latitude 5455
- Specifications of Latitude 5455
- Dimensions and weight
- Processor
- Chipset
- Operating system
- Memory
- External ports
- Internal slots
- Wireless module
- Audio
- Storage
- Media-card reader
- Keyboard
- Camera
- Touchpad
- Power adapter
- Battery
- Fingerprint reader
- Display
- GPU—Integrated
- External display support
- Sensor
- Hardware security
- Operating and storage environment
- Dell support policy
- Using the privacy shutter
- Dell Optimizer
- Working inside your computer
- Removing and installing Customer Replaceable Units (CRUs)
- Removing and installing Field Replaceable Units (FRUs)
- Software
- BIOS Setup
- Troubleshooting
- Handling swollen rechargeable Li-ion batteries
- Locating the Service Tag or Express Service Code of your Dell computer
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System-diagnostic lights
- Backup media and recovery options
- Wi-Fi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
- Revision history
Latitude 5455 Owner's Manual
Removing the system board
CAUTION:The information in this removal section is intended for authorized service technicians only.
Prerequisites
- Follow the procedure in Before working inside your computer.
- Remove the base cover.
- Remove the SSD.
- Remove the fan.
- Remove the heat sink.
- Remove the display assembly.
About this task
NOTE:The USB Type-C bracket is bundled with the system board. DO NOT remove the USB Type-C bracket from the system board.
- Fan cable connector (JFAN1)
- Camera-cable connector (MIPI)
- Display-cable connector (EDP)
- Solid state drive slot (SSD)
- Left speaker-cable connector (JSPK1)
- Battery-cable connector (JBATT1)
- Keyboard-backlight cable connector (JKBBL1)
- Keyboard-cable connector (JKB1)
- Touchpad-cable connector (JTP1)
- Right speaker-cable connector (JSPK2)
- I/O-board cable connector (JIO1)
- Wireless card (WLAN)
- Coin-cell cable connector (JRTC1)
NOTE:The replacement system board is shipped with the coin-cell battery attached.
Steps
- Remove the screw (M2x2.5) that secures the WLAN thermal shield to the palm-rest and keyboard assembly.
- Slide the WLAN thermal shield to the left and lift the shield off the palm-rest and keyboard assembly.
- Disconnect the WLAN antenna cables from the connectors (B and W) on the WLAN module.
- Disconnect the I/O board cable from the connector (JIO1) on the system board.
- Disconnect the right speaker-cable from the connector (JSPK2) on the system board.
- Open the latch and disconnect the touchpad cable from the connector (JTP1) on the system board.
- Open the latch and disconnect the keyboard cable from the connector (JKB1) on the system board.
- Open the latch and disconnect the keyboard backlight-cable from the connector (JKBBL1) on the system board.
- Disconnect the left speaker-cable from the connector (JSPK1) on the system board.
- Remove the two screws (M1.6x1.8) that secure the system board to the palm-rest and keyboard assembly.
- Lift the system board off the palm-rest and keyboard assembly.
NOTE:The USB Type-C bracket is bundled with the system board. DO NOT remove the USB Type-C bracket from the system board.
Figure 4. USB Type-C bracket 
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