Dell Precision R5400 Service Manual page 47

1. Holding the system board by the blue release knob and the metal tab/handle, lower the system-board tray into the chassis at a 45-degree angle
toward the power-supply bay until the tray sits flat on the bottom of the chassis.
2. Ensure that all nine system-board tray securing-tabs are fully inserted into the nine system-board securing slots on the bottom of the chassis.
3. Slide the system-board tray toward the back of the chassis until the plunger in the release knob locks into position.
4. Replace the heat sink(s) and processor(s) (see
5. Replace the memory modules (see
6. Reconnect the control-panel cable to the system board.
7. Reconnect the four fan connectors to the system board.
8. Reconnect the front USB cable connector to the system board.
9. Reconnect the SATA_0, SATA_1, and SATA_2 data connectors to the system board.
10. Reconnect the power cables labeled "P1," "P2," "P3," and "P4" to the system board.
11. Replace the cooling shroud (see
12. Replace the expansion-card cages (see
13. Replace the mid-support brace (see
14. Replace the computer cover (see
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Installing a Processor).
Installing Memory Modules).
Replacing the Cooling Shroud).
Replacing an Expansion-Card
Replacing the Mid-Support Brace).
Replacing the Cover).
Cage).