Oracle X5-4 Service Manual page 251

10. To remove the SAS, NVMe (if present), and ESM cables from the system,
carefully thread each one between the CPU 0 heatsink and the power supply side
wall, and out towards the front of the system.
Some of the cable connectors only fit one way between the CPU 0 heat sink and power supply
side wall as the space is very narrow.
Remove the data and power cables for the disk backplane.
11.
See "Replace the Disk Drive Backplane (FRU)" on page
12. Remove the power supply cable from the motherboard.
Connected to the motherboard from the power supply backplane.
13. Remove any USB flash drives attached to the internal USB ports.
Make note of the ports for each USB flash drive.
14. Remove the heatsinks and CPUs from the motherboard.
See "Remove a Heatsink and CPU (FRU)" on page
15. Remove the system battery.
See "Replace the System Battery (CRU)" on page
Loosen the green captive screw that secures the motherboard to the chassis.
16.
Replace the Motherboard (FRU)
238.
186.
172.
Servicing FRU Components 251