IBM 7063-CR2 Manual page 52

For instructions, see "Disconnecting the power cords from a 7063-CR2 system" on page 100.
b) Label and remove the signal cables from the rear of the system.
c) Loosen the two screws (A) on the sides of the system backplane as shown in the following figure.
Figure 46. Removing the system backplane screws
d) Simultaneously rotate the two levers (A) on each side of the system backplane out and to the side
to unlock the system backplane from the system.
Figure 47. Unlatching the system backplane
e) Support the system backplane by the bottom as you slide it from the system.
Figure 48. Removing the system backplane
f) Place the system backplane on an ESD surface.
Note: You must remove and replace the system backplane at a flat angle. The ventilation holes in
the top cover can come into contact with the DIMMs in the system backplane if the insertion of the
backplane is at an angle or is rushed. As a result of possible contact, DIMMs can be scratched and can
leave residue on the top cover.
4. Remove the PCIe adapter or filler from the PCIe riser.
For instructions, see "Removing a PCIe adapter from the 7063-CR2 system" on page 33.
5. Remove the four screws that secure the PCIe riser to the system backplane.
38 Power Systems: Servicing the IBM Power Systems HMC (7063-CR2)