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70 Replacing and Adding System Components
Replacing the power supply
The redundant power supply offers fault tolerance and hot-swap capabilities.
However, if the power distribution board at the base of the power supply or
some other part of the power supply fails, the entire power supply and its
housing must be replaced. This type of failure is indicated by both power
supply status LEDs flashing and an audible alarm, or the system will fail to
power up.
To replace the power supply:
1 Turn off the system and disconnect the power cord, modem cord (if
installed), and all external peripheral devices.
2 Observe all safety and static electricity precautions. (See “Preventing static
electricity discharge” on page 22.)
3 Remove the bezel. (See “Removing the bezel” on page 25.)
4 Remove the left side cover panel. (See “Removing the side cover panel”
on page 26.)
5 Disconnect the power supply connectors from all internal devices,
including the 3.5-inch diskette drive, the CD drive, and all hard drives.
Make a note of where everything is connected.
6 Disconnect the main power supply connector from the system board by
pressing on the tab to release the connector, then gently pulling the
connector from the board.
8508366.book Page 70 Tuesday, October 23, 2001 11:29 AM