Complete the following steps to troubleshoot power supply issues on NetScaler:

1. Physically reseat the removable NetScaler power supply.

2. Ensure that you are using LOM version 3.x. With LOM 2.x, false positives of power supply failures are common because the scaling factors for power supply voltages was changed.  Because of this, some NetScaler firmware versions will report false power supply failures unless LOM version 3.x is being used.
   For more information refer to CTX215590 - Error: "Power Supply Failure detected" erroneously reported by LOM.

3.  Login to the ADC SDX appliance XenServer IP address and use the following command to verify the sensor lists:
   ipmitool sensor list

   This example output is for a functional power supply, where the status of 0x1 denotes the power supply health is good:
   PS Status        | 0x1        | discrete   | 0x0100| na        | na        | na        | na        | na        | na

   This example output is for a failing power supply, where the status of 0x2 denotes the power supply health is failing. If the PS_* status is 0x2 then contact technical support.
   PS_1 Status      | 0x2        | discrete   | 0x0200| na        | na        | na        | na        | na        | na
   PS_1 Fan Status  | 0x2        | discrete   | 0x0200| na        | na        | na        | na        | na        | na   

4. On ADC MPX use the following command to verify the status of the power supply:
   stat system -detail | grep -i power

   

5. In some instances, older versions of the software can report a power supply failure erroneously. Check the ADC SDX Service VM firmware version by opening the management service IP address, selecting the Configuration tab, and look under System Information > Build.
   Alternately from the command line, login to the ADC SDX appliance Xenserver IP address and check the bundle version with this syntax:
   rpm -qa | grep -i netscaler

   

   Compare this value to the most recent ADC SDX Bundle available from Citrix at https://www.citrix.com/downloads/netscaler-adc/service-delivery-appliances/

6.  Run the following command at the XenServer shell prompt at root:
   ipmitool mc info

   

   Determine if the firmware version reported matches the recommended version published at the NetScaler LOM Version and Support Matrix.
   If the LOM firmware version can be upgraded, verify if the option of an automated LOM firmware upgrade is available here: https://www.citrix.com/downloads/netscaler-adc/components/lom-firmware-upgrade.html

7. Use the following table to troubleshoot the PSU based on the status of the LED:

                                                     

   LED Power Supply Indicators
   Power Supply Type	LED Color	LED Indicates
   AC	OFF	No power to any power supply.
   	Flashing RED	No power to this power supply.
   	Flashing GREEN	Power supply is in standby mode.
   	GREEN	Power supply is functional.
   	RED	Power supply failure.
   DC	OFF	No power to any power supply.
   	Flashing RED	No power to this power supply.
   	Flashing BLUE	Power supply is in standby mode.
   	BLUE	Power supply is functional.
   	RED	Power supply failure.

CTX200084 - General Information on NetScaler SDX LOM
CTX216964 - Determine if NetScaler Power Supply Units (PSU) is AC or DC
Refer to Hardware Platforms section to know about the hardware specifications of your appliance
Refer to Installing the Hardware for connecting physically to the device
Refer to LCD Display and LED Status Indicators for LCD Keypad Alerts and LED Status Indicator that is useful when troubleshooting NetScaler hardware issue.