Removing the system board: 2145-CG8 or 2145-CF8

You must remove the system board if you are instructed to replace the SAN Volume Controller 2145-CG8 or 2145-CF8 node system board FRU.

Before you begin

DANGER

Multiple power cords. The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords. (L003)

or

or

You must remove and replace the microprocessor when you replace the system board. Ensure that you have alcohol wipes and thermal grease available to correctly perform this task.

Before you proceed with the system board removal, ensure that you do the following:

• Have a static-protected surface available to hold the components that you remove from the old system board.
• Follow all standard safety and handling instructions. The components that you will be handling are electrostatic-discharge sensitive. Take precautions to avoid damage from static electricity. Wear an anti-static wrist strap and use a static-protected mat or surface. For more information, see Handling static-sensitive devices.

1. Read the safety information to which Preparing to remove and replace parts refers.
2. Follow the procedure in MAP 5350: Powering off a node to verify that hosts will not lose access to data in volumes before you power off the node.
3. Slide the node out on its slide rails to the fully extended position.
4. When the node is completely turned off, remove the cable-retention brackets and disconnect the power cables, as described in Removing the cable-retention bracket.
5. To make sure that you can replace all cables in the same ports from which they were removed, label the port position of each Fibre Channel and Ethernet cable; then remove all cables from the back of the node.
6. Optional: Remove the node from the rack and place it on a flat, static-protective surface. See Removing a node from a rack.

   You can accomplish most service actions when the node is fully extended from the rack on its slide rails. If the location of the node in the rack is too high or too low to work comfortably, you can remove the node from the rack.

7. Remove the top cover, as described in Removing the top cover: 2145-CG8 or 2145-CF8.
8. Remove the Fibre Channel adapter and riser-card assembly from slot 1. Set the adapter and riser card aside on the static-protected surface. See Removing the Fibre Channel adapter assembly.
9. Remove the high-speed SAS adapter and riser card assembly from slot 2, if it is present, as described in Removing the high-speed SAS adapter assembly: 2145-CG8 or 2145-CF8.
10. Remove the 10 Gbps Ethernet adapter assembly from connector slot 2, if it is present, as described in Removing the 10 Gbps Ethernet riser-card assembly.
11. Remove the disk-controller and USB riser-card assembly, as described in Removing the disk-controller and USB riser-card assembly: 2145-CG8 or 2145-CF8.
12. Remove the power supplies, as described in Removing a power supply: 2145-CG8 or 2145-CF8.
13. Remove the microprocessor in slot 1, as described in Removing the microprocessor: 2145-CG8 or 2145-CF8; then remove the white plastic air baffles by lifting them straight up.
14. Remove the memory modules and set them aside on a static-protective surface, as described in Removing the memory modules (DIMM).
    Note: Make a note of the location of each DIMM as you remove it, so that you can later reinstall it in the same connector.
15. Disconnect all cables from the system board. Make a list of each cable as you disconnect it; you can then use this as a checklist when you install the new system board.
16. Remove the hot-swap fans, as described in Removing the fans: 2145-CG8 or 2145-CF8.
17. Press the fan bracket release latches (one is to the left of fan 6 and one is to the right of fan 1) inward toward the fans and rotate the fan assembly brackets up toward the front of the node.
18. Grasp the system board handle ( 1  in Figure 1) and slide the system board away from the back of the node. Lift the side of the system board that is nearer to the power supply units slightly so that it disengages from the locator pin; then, slide the system board slightly toward the left of the node, as shown in Figure 1.
    Figure 1. Removing and replacing the SAN Volume Controller 2145-CG8 or 2145-CF8 system board

    
    •  1  System-board handle
    •  2  Fan-assembly bracket
19. Lift up the system board and carefully remove it from the node, being careful not to damage any surrounding components.
20. If you are instructed to return the system board, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.