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GPU, and the cold plate. If the processor TIM is damaged, it must be replaced. GPU TIMs must always be
replaced. Ensure that you have spare TIMs available before proceeding.
Familiarize yourself with the cold plate installation carrier. You use the carrier to remove and replace the
cold plate assembly. The installation carrier is a metal frame that fits over the system.
• Each processor cold plate & GPU cold plate has a corresponding holder in the installation carrier.
• Each holder has holes and plastic latches to secure the pins on the top of each cold plate. Slide the
holder near to the top of the pins; the pins are narrower at the top.
• Each holder has a quarter turn screw that can be loosened to remove the holder from the carrier. This
helps when you need to install or remove the cold plate from the carrier.
• The holder also has alignment pins to help you replace the holder in the carrier.
• The carrier has hook-and-loop fasteners to hold the water pipes and hoses.
Procedure
1. 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.
2. Remove the air baffles (A), (B), and (C) as shown in Figure 5 on page 9.
They lift straight up; you might need to maneuver them around the hoses.
8 Power Systems: Servicing the 8335-GTW
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