NEC 120Lg manual System Board

System Board

To remove the system board all the processor(s), DIMMs, and PCI option boards (if installed) on the board must be removed and all system board cable connectors tagged and unplugged.

!CAUTION

The system board can be extremely sensitive to ESD and always requires careful handling. After removing it from the system, place it component-side up on a nonconductive, static-free surface to prevent shorting out the battery leads. Do not slide the system board over any surface.

To remove the system 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 left-hand side access panel of the system chassis 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.

8.Remove the processor air duct. See Processor Air Duct Removal earlier in this chapter.

9.Remove the rear cooling fan following procedures described in the previous section.

10.Perform the processor(s) and DIMM(s) removal procedures described earlier in the section Modifying the System Board. Save the processor(s) and DIMM(s) for reassembly.

4-58 Disassembly and Reassembly