System Board Layout; Side Cover; Removing The Side Cover - Dell Vostro 3681 Service Manual

System board layout

This section illustrates the system board and calls out the ports and connectors.
1. ATX Power connector (ATX_CPU1 and ATX_CPU2)
2. CPU fan connector (Fan_CPU)
3. Memory-module slots (DIMM1, DIMM2)
4. M.2 2230/2280 connector (for SSD)
5. Power switch connector (PWR_SW)
6. SD card reader connector
7. ATX Power connector(ATX_SYS)
8. M.2 2230 connector (for WLAN card)
9. SATA 3.0 data connector (SATA0)
10. SATA 3.0 data connector (SATA3)
11. SATA 3.0 power connector (SATA_PWR)
12. PCIe expansion slots (SLOT1: PCIe x1, SLOT2: PCIe x16)
13. Coin-cell battery
14. CPU socket

Side cover

Removing the side cover

Prerequisites
1. Follow the procedure in Before working inside your computer.
14 Disassembly and reassembly