![](/images/new-backgrounds/1158688/15868895x1.webp)
vBlower error: This amber LED is lit and stays lit when an error has been detected in the blower. The system error LED on the BladeCenter system LED panels is also lit.
I/O module
See the documentation that comes with each I/O module for a description of the LEDs on the I/O module.
Power module
AC power
AC
DC
DC power
Power module LEDs: These green LEDs indicate the condition of the power module. For additional information, see the “Light Path Diagnostics” section in the BladeCenter Hardware Maintenance Manual and Troubleshooting Guide on the IBM BladeCenter Documentation CD.
vAC power: When this LED is lit, ac input to the power module is present and within specifications. During typical operation, both the ac and dc power LEDs are lit. For any other combination of LEDs, see the Hardware Maintenance Manual and Troubleshooting Guide on the IBM BladeCenter Documentation CD.
vDC power: When this LED is lit, the dc output from the power module to the other components and blade servers is present and within specifications. During typical operation, both the ac and dc power LEDs are lit. For any other combination of LEDs, see the Hardware Maintenance Manual and Troubleshooting Guide on the IBM BladeCenter Documentation CD.