Preparing the system to remove and replace a voltage regulator module

To prepare the system to remove and replace a voltage regulator module, complete the steps in this procedure.

1. Identify the part and the system that you are working on. For instructions, see Identifying a part.
   Use the blue identify LED on the enclosure to locate the system. Ensure that the serial number of the system matches the serial number to be serviced.
2. Stop the system. For instructions, see Stopping a system.
3. If applicable, open the rack rear door.
4. Attach the electrostatic discharge (ESD) wrist strap.
   The ESD wrist strap must be connected to an unpainted metal surface until the service procedure is completed, and if applicable, until the service access cover is replaced.

   Attention:

   • Attach an electrostatic discharge (ESD) wrist strap to the front ESD jack, to the rear ESD jack, or to an unpainted metal surface of your hardware to prevent the electrostatic discharge from damaging your hardware.
   • When you use an ESD wrist strap, follow all electrical safety procedures. An ESD wrist strap is used for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
   • If you do not have an ESD wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds. If at any point in this service process you move away from the system, it is important to again discharge yourself by touching an unpainted metal surface for at least 5 seconds before you continue with the service process.
5. If the system power is turned off, label and disconnect the power source from the system by unplugging the power cords from the system.
   Note: You can use the hook-and-loop fastener to attach the power cords to the system. If you are placing the system in a service position after you disconnect the power cords, ensure that you unstrap the fastener.

   

   (L003)

   

   or

   

   or

   

   or

   

   or

   

   

   

   DANGER

   Multiple power cords. The product might be equipped with multiple AC power cords or multiple DC power cables. To remove all hazardous voltages, disconnect all power cords and power cables. (L003)
6. Label and disconnect all external cables that are attached to the PCIe adapters.
7. If applicable, open the rack front door.
8. Remove the front cover.
   1. Place your fingers on the indentations on both sides of the front cover.
   2. Pull the front cover away from the system.
   CAUTION:

   The fans can pull in hair, jewelry, loose clothing, and so forth, and cause injury or damage. Operate the system with the bezel installed. For service operations, if the front cover must be removed with the system operating, ensure that all such loose material is secured away from the fan area, to prevent any loose material from being pulled into the fan.
9. Place the system in the service position.
   Do not pull out or install any drawer or feature if the rack stabilizer brackets are not attached to the rack. Do not pull out more than one drawer at a time. The rack might become unstable if you pull out more than one drawer at a time.

   

   1. If not already removed, remove the two shipping screws from both sides of the front of the system by using a Phillips screwdriver.
   2. Release the side latches by pressing them downwards and outwards.
   3. Slide the system out of the rack. Ensure that any cables do not catch or bind as you pull out the system.

   

10. Remove the service access cover.
    Attention: The system power must be turned off before the service access cover is removed. Removing the service access cover with the system power turned on causes the system power to turn off immediately.

    1. Lift and rotate the two release latches towards the rear to release the cover.
    2. Tilt the cover by lifting up on the end of the service access cover that has the two release latches.
    3. Lift the cover up and off the system unit.

       

11. To activate the identify LED for the faulty part, press and hold the push-button on the trusted platform module.
    Verify that the green LED on the TPM is lit, which indicates that sufficient power exists for the identify LED. If the green LED is not lit, use the location code to find the physical location by using the service label.

    

12. Look for the amber LED of the faulty or failed voltage regulator module.
    The VRMs have two LED indicators: one on the system planar and one on the top center of the VRM. The figures indicate both locations.