Removing the main board: 2145-SV1

You might need to remove the main board from a SAN Volume Controller 2145-SV1 node.

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)

Perform the following steps to remove the main board.

1. Read all of the safety information.
2. Before you power off the node, verify that hosts will not lose access to data in volumes. See MAP 5350: Powering off a node for details.
3. Disconnect all power cords.
4. Disconnect all SAS cords from the back of the enclosure.
5. Pull the power supplies out of the rear of the node to disengage them from the node. Follow the procedure that is described in Removing a power supply: 2145-SV1.
6. Remove the top covers, as described in Removing the top covers: 2145-SV1.
7. Remove the Trusted Platform Module (TPM), as described in Removing and replacing a Trusted Platform Module: 2145-SV1.
8. Remove all PCI riser-card assemblies, as described in Removing a PCI express riser-card assembly: 2145-SV1.
9. Remove the air baffle, as described in Removing the air baffle: 2145-SV1.
10. Remove the Ethernet edge board, as described in Removing and replacing the Ethernet edge board: 2145-SV1.
11. Remove the memory modules, as described in Removing the memory modules: 2145-SV1. Then, set them aside on a static-protective surface for reinstallation.
    Note: Make a note of the location of each DIMM as you remove it so that you can reinstall it in the same connector.
12. Remove all heat sinks and microprocessors, as described in Removing the microprocessor: 2145-SV1. Set them aside on a static-protective surface for reinstallation.
    Note: Do not allow the thermal grease to come in contact with anything. Contact with any surface can compromise the thermal grease and the microprocessor socket.
13. Remove the CMOS battery, as described in Removing the CMOS battery: 2145-SV1.
14. Disconnect all cables from the main board. Label each cable, and then make a list of each cable as you disconnect it, so you can use it as a checklist when you install the new main board.
    Figure 1 shows the location of the SATA drive backplane and connectors.

    

    •  1  SATA drive backplane
    •  2  SATA drive backplane power cable connector on the SATA drive backplane
    •  3  SATA drive backplane SATA cable connector 2
    •  4  SATA drive backplane SATA cable connector 1
    •  5  SATA cable connector 2 on the main board
    •  6  SATA cable connector 1 on the main board
    •  7  SATA drive backplane power cable connector on the main board

    Note: The main board FRU was cost-reduced and unused connectors were removed. You might find that only one SATA cable is needed to connect the SATA drive backplane to the main board. Previously, a second SATA cable was provided to allow for a 5th and 6th boot drive, which the system did not need.

    Attention: Disengage all latches, release tabs, or locks on cable connectors when you disconnect all cables from the main board. Failing to release them before you remove the cables damages the cable sockets on the main board. The cable sockets on the main board are fragile. Any damage to the cable sockets might require replacing the main board.
15. Remove the fan cage, as described in Removing the fan bracket: 2145-SV1.
16. Release the two screws ( 1  and  3  in Figure 2) on the main board.

    

    •  1  Attachment screw 1
    •  2  Support pegs for top cover
    •  3  Attachment screw 2

17. Carefully push the main board forward a little to release it. Then, raise the main board at a slight angle, as shown in Figure 3.

    

    Attention: The previous figure shows four cables. As noted in step 14, label each cable, and make a list of the corresponding connectors so that you can reconnect the cables to a new system board correctly. If the cables are reconnected incorrectly, problems can occur when the system starts.
18. Slide the main board from the rear of the chassis. Be careful to avoid the two pegs that hold the top cover ( 2  in Figure 2).
19. If you are instructed to return the main board, follow all packaging instructions. Use any packaging materials for shipping that are supplied to you.