Service Manual
Table Of Contents
- Precision 3470 Service Manual
- Contents
- Working inside your computer
- Removing and installing components
- Recommended tools
- Screw list
- Major components of Precision 3470
- Micro Secure Digital (SD) Card
- Base cover
- Wireless card
- Solid-state drives
- Memory
- Battery
- Battery cable
- Assembly inner frame
- LED board
- Heat sink
- Speakers
- System board
- Power button with fingerprint reader
- Smart card reader
- Coin-cell battery
- Keyboard assembly
- Keyboard bracket
- Display assembly
- Display bezel
- Display panel
- Camera
- eDP/display cable
- Sensor board
- Display hinges
- Display back cover
- Dummy SIM-card slot filler
- Palm-rest assembly
- Drivers and downloads
- BIOS setup
- Troubleshooting
- Handling swollen Lithium-ion batteries
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System-diagnostic lights
- Recovering the operating system
- Real-Time Clock (RTC Reset)
- Auto RTC reset
- Backup media and recovery options
- WiFi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
1. Remove the two (M2x3) screws that secure the eDP/display cable bracket to the system board.
2. Lift the eDP/display cable bracket away from the system.
3. Peel the tape that secures the display cable to the system board.
4. Using the pull tab, disconnect the display cable from the connector on the system board.
5. Disconnect IR camera cable from the connector on the system board (for models shipped with an IR camera).
6. Disconnect the touch screen cable from the connector on the system board (for models shipped with a touch screen).
7. Open the latch and disconnect the USH board cable from the connector on the system board.
8. Open the latch and disconnect the touchpad cable from the connector on the system board.
9. Open the latch and disconnect the LED cable from the connector on the system board.
10. Disconnect the coin-cell battery cable from the connecter on the system board.
NOTE:
When you disconnect the coin-cell battery cable from the connecter on the system board, the CMOS setting is
cleared.
11. Remove the three (M2x5) screws that secure the USB Type-C bracket to the system board.
12. Lift off the USB Type-C bracket off the system board.
13. Remove the four (M2x3) screws that secure the system board to the palm-rest assembly and keyboard assembly.
14. Lift the system board off the palm-rest assembly and keyboard assembly.
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 location of the system board and provide a visual representation of the installation procedure.
46
Removing and installing components