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
Heat sink
Removing the heat sink and fan assembly - UMA
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the microSD card.
3. Remove the base cover.
About this task
The following images indicate the location of the heat sink and fan assembly and provide a visual representation of the removal
procedure.
Steps
1. Disconnect the system fan cable from the connector on the system board.
2. Remove the two screws (M2x5) that secure the system fan to the system board.
3. In reverse sequential order (as indicated on the heat sink), loosen the four screws (M2x3) that secure the heat sink and fan
assembly to the system board.
4. Lift the heat sink and fan assembly off the system board.
NOTE:
Do not damage the thermal fan sponge during any replacement procedures. Damaging this sponge reduces the
effectiveness of the heat dispersion.
Removing and installing components 37