Installing System Components 99
4
Replace the power distribution boards. See "Installing a Power
Distribution Board" on page96.
5
Close the system. See "Closing the System" on page92.
6
Reconnect the system to its electrical outlet and turn on the system,
including any attached peripherals.
Midplanes

Removing the Midplanes

CAUTION: Many repairs may only be done by a certified service technician.
Youshould only perform troubleshooting and simple repairs as authorized in
yourproduct documentation, or as directed by the online or telephone service
andsupport team. Damage due to servicing that is not authorized by Dell is not
covered by your warranty. Read and follow the safety instructions that came
withthe product.
1
Turn off the system, including any attached peripherals, and disconnect
the system from its electrical outlet.
2
Open the system. See "Opening the System" on page 91.
3
Remove the system-board assemblies. See "Removing a System-Board
Assembly" on page 61.
4
Remove the cooling fans. See "Removing a Cooling Fan" on page92.
5
Remove the screws that secure the cooling-fan brackets to the chassis.
See Figure3-26.
6
Lift the cooling-fan brackets out of the chassis. Figure3-26.
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