110 REMOVAL AND REPLACEMENT PROCEDURES
System Board
To remove the system board:
1 Disconnect power from the system (page 68), remove the access panel (page 74), lay the
workstation on its side with the system board facing up, remove all expansion boards and graphics
cards (page 90), remove the CPU heatsink (page 105), and if an airflow duct is installed, remove the
system fan assembly (page 80).
2 Disconnect all cabling from the system board.
CAUTION Be sure you can differentiate which power cable was disconnected from the PCI Express x16
graphics card and which power cable was disconnected from the system board. These two cables look
very similar. The PCI Express power cable has a black connector and the power cable has a white
connector. When power is present, you must NEVER connect the PCI Express power cable to the
system board. If you do so, the system board may be damaged and your warranty voided. To see a
picture of the PCI Express cable and where it must be connected, refer to the “PCI or PCI Express
Installation” section on page 91.
NOTE Make note of the cable connections before disconnecting them from the system board. Refer to
“Power Connections to Drives” section on page 95 for more information.
3 Slide the system board forward 1 to disengage the plastic mounting standoffs from the chassis.
4 Lift the system board out 2 of the chassis, being careful not to damage the cables and rear panel
connectors.
To replace the system board:
1 Insert straight down and make sure all system board standoffs engage with the keyholes in the
chassis.
NOTE Be sure the system board connectors engage correctly with the rear I/O panel.
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