Caution - Some components on the motherboard might be hot. Use caution when handling the motherboard and adjacent components.
Note - The system must be completely powered down before this component is replaced. This component must be replaced only by qualified service technicians. Contact your Sun Service representative for assistance.
Refer to Completely Power Off the System.
Refer to Perform Static Discharge Procedures.
This task involves removing all cables, moving the rack into maintenance position, and then removing the chassis from the rack. Refer to Remove the Chassis From the Rack.
Refer to Access Internal Components.
Figure 31 Disconnecting the Motherboard-to-PDB Cable
If you remove the FMods from the board, note the memory configuration so that you can reinstall the FMods in the same configuration on the new motherboard.
Figure 32 Removing Cables From the Backplane
Note - Set the four screws aside. You must use these screws to attach the motherboard to the bus bar during installation.
The captive screw is located to the left of the bus bar screws.
Note - When removing the motherboard, be aware of the clearance to the side of the array to avoid hitting the motherboard against it.
Caution - If you are removing the motherboard to access other components and will return it to the system, place it on an antistatic mat after you remove it.
Figure 33 Removing a Motherboard Assembly
Note - The ESM cables fit firmly on their receptacles and, as such, can be somewhat difficult to remove. Use care when removing these cables to avoid damaging the motherboard.
Figure 34 Removing the ESM Power Cables