Oracle Sun Server X4-4 Service Manual page 225

19. Ensure that the keyed holes in the plate attached to the underside of the
motherboard are aligned with the locking standoffs in the chassis.
20. Slide the motherboard toward the back of the server.
This action locks the motherboard and aligns the captive screw on the motherboard plate with
its thread hole in the chassis.
To secure the motherboard to the chassis, tighten the captive screw.
21.
22. Before install the CPUs, remove the CPU cover plates relevant sockets. See
"Remove a CPU Cover Plate (FRU)" on page
Install the CPUs and heatsinks. See
23.
(FRU)" on page
Insert and tighten the four bus bar screws that secure the motherboard to the
24.
power supply backplane.
"Install a Heatsink and CPU
181.
Replace the Motherboard (FRU)
168.
Servicing FRU Components 225