1 Disconnect all the cables connected to the system-board assembly.
1 Top panel USB cables
2 SATA 6 Gbps drive cable
3 SATA 6 Gbps drive cable
4 system board
5 front-panel audio cable
6 LED controller cable
7 graphics-card power cable
8 processor power cable
9 top-chassis fan cable
10 system-board power cable
11 front-chassis fan cable
2 Remove the screws that secure the system-board assembly to the chassis.