Specifications

4.11 Replacing the System Board
The following steps describe the removal procedure for the system board. Refer
to Figure 4–11 and Table 4–13 during the procedure.
1. Shut down the system and unplug the power cord (Section 4.4).
2. Remove the cabinet top cover, left side panel, and card cage cover using the
procedure in Section 4.5.
3. Disconnect the external cables attached to the rear panel connectors.
4. Remove the two hex standoff nuts (and lock washers) from each of the four
rear panel D connectors. Save these eight nuts (and washers).
5. Remove the CPU module using the procedure in Section 4.6.
6. Remove the memory module retaining bar, and the memory module (if one
is present), using the procedure in Section 4.9.
7. Disconnect any internal cables from option modules installed in the EISA
bus slots.
8. Remove any option modules installed in the EISA bus slots using the
procedure in Section 4.10.
9. Disconnect the internal cables from the system board connectors.
Caution
Connector J0840 has two 6-pin power cables connected to it, each with
a different wire color code. Make a note of the wire color code before
you remove these power cables. Be sure to connect them in the correct
order.
4–22 FRU Removal and Replacement