Removing The System Board - Dell Precision R5400 Service Manual

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System Board
Dell Precision™ R5400 Service Manual
Removing the System Board
Installing the System Board
CAUTION: Only trained service technicians are authorized to remove the computer cover and access any of the components inside the computer.
Before working inside the computer, read the safety information that shipped with the computer. For additional safety best practices information,
see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the System Board
1. Perform the steps in Before Working on Your
2. Remove the power cable from the power supply at the back of the computer.
3. Remove both expansion-card cages (see
any expansion cards installed in the card cages.
4. Remove the mid-support brace (see
5. Remove the cooling shroud (see
6. Disconnect the power cables labeled "P1," "P2," "P3," and "P4" from the system board.
1 power-cable connector P1
3 power-cable connector P2
5 power distribution unit
7 cable-routing portal (power cables
P4, P5, and P6)
9 hard-drive (lower) power cable
Computer.
Removing an Expansion-Card
Removing the Mid-Support Brace).
Removing the Cooling Shroud).
2 cable-routing clip (power cable
P1)
4 cable-routing portal (power
cables P1, P2, and P3)
6 power-cable connector P3
8 hard-drive (upper) power cable
connector (P8)
10 optical-drive power cable
Cage), ensuring that you disconnect the power cables labeled "P5" and P6" from