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AC450NX Rack Server System Product Guide
MidPlane
Removing the Midplane
1. Observe the precautions on page 115, "Safety Guidelines."
2. Remove the top and PCI bus regular slot covers as described in Chapter 12, "Server Covers:
Removing/Reinstalling."
3. Remove the CPU tray as described earlier.
4. Remove the I/O Tray as described earlier.
5. Remove three screws holding the upper midplane support bracket and remove the bracket.
6. Remove four screws holding the midplane support bracket to the chassis and remove the
bracket.
7. Remove and save the screws that attach the midplane to its support bracket and remove the
midplane.
8. Place the midplane on a nonconductive, static-free surface, or store it in an antistatic protective
wrapper.
Reinstalling the Midplane
1. Remove the midplane from the antistatic protective wrapper if you placed it in one.
2. Position the midplane on its support bracket and insert the screws loosely into the threaded
standoffs.
3. Make sure the midplane is properly positioned, and tighten all screws firmly (8.0 inch-
pounds).
4. Reinstall the midplane and its support bracket in the chassis.
5. Reinstall the upper midplane support bracket.
6. Reinstall the I/O Tray as described earlier.
7. Reinstall the CPU baseboard tray as described earlier.
8. Remove the top and PCI bus regular slot covers as described in Chapter 12, "Server Covers:
Removing/Reinstalling."
AC Filter and Cable
Removing the AC Filter and Cable
1. Observe the precautions on page 115, "Safety Guidelines."
2. Remove the top cover as described in Chapter 12, "Server Covers: Removing/Reinstalling."
3. Remove the CPU tray as described earlier.
4. Remove the I/O Tray as described earlier.
5. Remove and save the screws that attaches the AC filter tray to the chassis.
6. Remove and save the screws that attaches the three AC plugs to the chassis.
7. Remove the three plug retaining brackets.
8. Remove the AC filter and cable.
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Troubleshooting
