IBM 8688 manual Midplane-board VRM

7.Remove the midplane board by turning the two midplane thumbscrews (
1) to release it; then, carefully pull the midplane board out of its socket (
2).

8. To replace the midplane board, reverse the previous steps.

Midplane-board VRM

Before you begin:

vRead “Installation guidelines” on page 77.

vRead the safety notices at “Safety notices (multilingual translations)” on page 201.

vRead “Handling static-sensitive devices” on page 200.

To remove the VRM from the midplane board, complete the following steps:

1.Turn off the server (see “Turning off the server” on page 8), and disconnect all power cords and external cables.

2.Open the top cover (see “Opening the cover” on page 88).

3.Remove the memory-board assembly. See “Memory board” on page 115 for details.

4.Remove the shipping thumbscrews from the right side of the server, and lift the retention bracket from the server.

5.Remove the processor-board assembly. See “Processor-board assembly” on page 119 for details.

6.Remove the PCI-X board assembly from the server (see “PCI-X board assembly” on page 123), and place it on a clean work surface.

7.Press down on the VRM-retention bar, and release the VRM-retention bar.

126IBM xSeries 450 Type 8688: Hardware Maintenance Manual and Troubleshooting Guide