System Board Components; Removing The System Board - Dell OptiPlex 3020 Owner's Manual

System Board Components

The following image displays the system board layout.
1. PCI Express x16 connector
3. intrusion-switch connector
5. power connector
7. CPU fan connector
9. HDD LED & chassis detect connector
11. coin-cell battery
13. system fan connector
15. ODD SATA connector
17. power connector
19. internal speaker connector
21. front audio connector

Removing the System Board

1. Follow the procedures in Before Working Inside Your Computer.
2. Remove the:
a) cover
b) front bezel
c) optical drive
d) drive cage
e) memory
f) heat sink assembly
g) expansion card(s)
h) power supply
3. Disconnect all the cables connected to the system board, and move the cables away from the chassis.
2. PCI Express x1 connector
4. PS/2, serial connector
6. processor socket
8. memory module connectors
10. power switch connector
12. system power connector
14. RTC reset jumper
16. HDD SATA connector
18. front i/o connector
20. password reset jumper
Disassembly and reassembly 25