NEC Express 5800/120Lg, Service Manual

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4-60 Disassembly and Reassembly
16. Install the two retention modules to the system board using the screws
removed in Step 15.
17.
Install the replacement system board into the server securing it with the eight
screws removed in Step 13.
18.
Connect all the power, signal, and fan cable connectors to their mating
connectors on the system board.
19. Perform the processor(s) and DIMM(s) installation procedures described
earlier in the section
Modifying the System Board .
20.
Install any PCI option boards removed from the system board. See PCI
Boards earlier in this chapter.
21.
Install the rear cooling fan following procedures previously described in this
chapter.
22.
Install the processor air duct following procedures previously described in
this chapter.
23. Reassemble any other removed components and check system board
operation..
Power Supply Back Board
To remove the power supply back board, perform the following procedures:
1.
Observe the safety and ESD precautions listed under General Information
and Static Precautions at the beginning of this chapter.
2. Open the front bezel of your system.
3. Shutdown the operating system (OS).
4. Press the power on/off switch on the front panel of the server (see
Front View in Chapter 1). The power-on LED goes out.
5.
Power off the peripheral devices.
6.
Unplug the system power cord(s) from the AC wall outlet(s).
Note:
If the system power cord is connected to a power
control unit such as an UPS (Uninterruptible Power Supply),
refer to the UPS user's guide for proper power-off
procedures.
7.
Remove the system left-hand side access panel following procedures
previously described in this chapter.
!
CAUTION
For proper cooling and airflow, do not operate the system
with the side access panel removed. Always
replace the
panel before powering on the system