IBM Power System 8247-42L Manual page 29

15. Disconnect and remove the power distribution signal cable (A) from the rear of the power supply
assembly and the system backplane connector. See Figure 8.
Figure 8. Removing the power distribution signal cable
16. Label and remove the memory modules. For instructions, see Removing a memory module
(http://www.ibm.com/support/knowledgecenter/POWER8/p8han/
p8han_82x_84x_memoryout.htm).
17. Remove the system I/O card. For instructions, see Removing the system I/O card with the power
turned off (http://www.ibm.com/support/knowledgecenter/POWER8/p8egl/
p8egl_82x_84x_removespc.htm).
18. Remove the rear USB cable. For instructions, see Removing the rear USB cable (http://
www.ibm.com/support/knowledgecenter/POWER8/p8egf/p8egf_82x_84x_rearusbcableout.htm).
19. If your system is an 8247-42L, label and remove any graphics processing unit (GPU) adapters that
are installed in PCIe adapter slot locations C3 and C6. Otherwise, skip this step.
a. Disconnect the adapter power cable (A) from the power distribution board. See Figure 9 on page
12.
11
System backplane