3
Hardware Troubleshooting
This chapter explains how to troubleshoot the system hardware.
3.1The PWR LED Does Not Turn On or Is Blinking
The PWR light blinks if the input power for the fans is not stable and is off if there is no input power. The PWR light stays on if the input for the fans is normal.
Table 3 PWR LED Troubleshooting
STEP CORRECTIVE ACTION
1Make sure the power wires are properly connected to the power supply and the power supply is operating normally. Make sure you are using the correct power source (refer to Chapter 5 on page 75). Make sure the power supply modules are turned ON. Refer to Section 4.2 on page 72.
3The LED itself, the fan module, or the unit may be faulty; contact your vendor.
3.2The ALM LED Is On
The ALM LED is on when at least one fan has failed in the fan module. Working fans emit a low buzz and blow air. If the fans are not working properly, refer to Section 4.1 on page 67 for instructions on changing a fuse or changing the fan module.
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