Dell R300 owner manual Installing the System Board Assembly, 121

NOTE: In the preceding figure, the 12C cable is shown connecting over the control panel cabling. This cable should be routed under the control panel cable and the internal USB key connector. The 12C cable seats in a cable guide clip that is directly beneath the control panel connector.

Installing the System Board Assembly

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

1Unpack the new system board assembly.

2While sliding the system board tray into place, tilt the board at an angle to ensure that the cables from the power distribution board are above the system board assembly.

3Slide the system board into the chassis ensuring that no cable connectors are under the system board assembly as you seat it in the chassis floor..

4Slide the system board tray backward until it stops.

5Press down on the plunger that secures the system board tray to the chassis. See Figure 3-24.

6Install the PDB 12C cable to the connector PDB_12C. See Figure 6-1 and see "Replacing the Power Distribution Board" on page 118.

7Install the internal USB key cable to the connector USB_CONN on the system board. See Figure 6-1 and see "Installing the Optional Internal USB Memory Key" on page 90.

8Connect the two power cables to the 12V and PWR_CONN connectors on the system board. See Figure 6-1.

9Install the riser cards. See "Installing the Riser Card" on page 99.

10Install all expansion cards in expansion-card left or center riser (RISER1 or RISER2). See Figure 6-1 and see "Installing an Expansion Card" on page 95.

11Connect the hard-drive interface cables.

12Connect the fan module cables to the FAN_MOD1 and FAN_MOD2 connectors on the system board. See "Installing the Fan Assembly" on page 86.

Installing System Components

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