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Power Supply
The following procedures describe the removal, replacement, and installation of the power supply. This
system can have up to two power supplies. The system power can remain on under the following
conditions:
v When installing a second power supply.
v When one of two power supplies present in the system is replaced.
Before performing the following procedures, read the "Safety Notices" on page ix.
Use one of the following proceedures to remove, replace, or install a power supply:
v If you are installing an option that requires removal of the power supplies, go to "Removing a Power
Supply with the System Power Off" on page 288.
v If you are replacing the primary power supply, and it is the only power supply present in the system, go
to "Removing a Power Supply with the System Power Off" on page 288.
v If you are installing a second power supply, or replacing one of two power supplies present in the
system, go to "Installing or Replacing a Power Supply with the System Power On" on page 291.
DANGER
Do not attempt to open the covers of the power supply. Power supplies are not serviceable and
are to be replaced as a unit.
D02
Power Supply LEDs
The power supply has three LEDs; two green LEDs (ac power good and dc power good), and one amber
LED, which indicate the power supply status. If both of the green LEDs are on solid (not blinking) and the
amber LED is off, then the power supply is operating correctly. If the ac power good LED is on, the dc
power good LED is blinking, and the amber LED is off, then the system is turned off, but the power supply
is still connected to the power source. If the amber LED is active, then the power supply is not operating
correctly.
Chapter 9. Removal and Replacement Procedures
287
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