Troubleshooting Redundant Power Supplies

lasts longer). You may need to replace the battery if an incorrect time or date is displayed during the boot routine.

You can operate the system without a battery; however, the system configuration information maintained by the battery in NVRAM is erased each time you remove power from the system. Therefore, you must re-enter the system configuration information and reset the options each time the system boots until you replace the battery.

Action

1.Re-enter the time and date through the System Setup program (see "Using the System Setup Program" in your User's Guide).

2.Turn off the system and disconnect it from the electrical outlet for at least one hour.

3.Reconnect the system to its electrical outlet and turn the system on.

4.Enter the System Setup program.

If the date and time are not correct in the System Setup program, replace the battery (see "System Battery" in "Installing System Options").

If the problem is not resolved by replacing the battery, see "Getting Help."

NOTE: Some software may cause the system time to speed up or slow down. If the system seems to operate normally except for the time kept in the System Setup program, the problem may be caused by software rather than by a defective battery.

NOTE: If the system is turned off for long periods of time (for weeks or months), the NVRAM may lose its system configuration information. This situation is caused by a defective battery.

Troubleshooting Redundant Power Supplies

Problem

•Power indicator on the front panel does not light

•Power supply amber fault indicator is on

•Systems management software issues a power supply–related message

•No power to the system

Action

1.Locate the faulty power supply.

The power supply's fault indicator is lit (see Figure 2-5).

2.Check that a power cable is connected to the power supply and that the green AC line status indicator on the supply is lit (see "Power Indicator Codes" in "Indicators, Codes, and Messages)."

CAUTION: To prevent risk of personal injury from electrical shock, do not reach into an empty power supply bay.

NOTICE: The optional redundant power supplies are hot-pluggable. The system requires one power supply to be installed for the system to operate normally. The system is in the redundant mode when two power supplies are installed. Remove and replace only one power supply at a time in a system that is powered on.

3.If AC power is available to the system, remove the faulty power supply (see "Removing a Redundant Power Supply" in "Installing System Options").

4.Install a new power supply (see "Installing a Redundant Power Supply" in "Installing System Options").

NOTE: After installing a new power supply, allow several seconds for the system to recognize the power supply and determine whether it is working properly. The power supply status indicator will turn green if the power supply is functioning properly (see Figure 2-5).

5.If the problem is not resolved, see "Getting Help" for information on obtaining technical assistance.