Removing the system backplane from the 8335-GTW

To remove a system backplane, complete the steps in this procedure.

Before you begin

Before you begin replacing the system backplane, record the system serial number and machine model type. After you replace the system backplane, you must set the system serial number and machine model type in the system backplane.

Power off the system and place it in the service position. For instructions, see Preparing the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system to remove and replace internal parts.

About this task

As part of the system backplane replacement, the system processor modules and GPUs are moved from the old system backplane to the new system backplane.

As part of the system backplane replacement, the cold plates are removed from the system processor modules and GPUs. Each module and GPU must have thermal interface material (TIM) between the module, the 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.

Procedure

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.
Remove the air baffles (A) and (B) as shown in Figure 1.
Carefully move the baffles around the hoses.
Figure 1. Removing the memory air baffles
Remove the BMC card.
For instructions, see Removing the BMC card from the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
Label and remove the PCIe adapters.
For instructions, see Removing a PCIe adapter from the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
Label and remove the disk and fan signal cable from the system backplane.
For instructions, see Removing the disk and fan signal cable from the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
Label and remove the fan power cable from the system backplane.
For instructions, see Removing the fan power cable from the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
Label and remove the power switch and cable from the system backplane.
For instructions, see Removing the power switch and cable from the 8335-GTW system
Remove the cold plates.
For instructions, see Removing the cold plates from the 8335-GTW or 8335-GTX system.
Using tweezers, carefully remove the TIM from the top of the system processor module and place it in a clean, dry area as shown in Figure 2.
The TIM can tear easily.
Figure 2. Removing the TIM from the system processor module
Remove dust and debris from the system processor module area.
If dust or debris is present, use the supplied air pump to clean the system processor module area. Blow small bursts of air from the center toward the sides of the system processor module as shown in Figure 3. If your air pump is not assembled as shown in Figure 3, fasten the tip onto the bulb.
Figure 3. Removing dust and debris from the system processor module area
Prepare the system processor module for removal.
1. Open the latches that hold the system processor module in the supplied removal tool (A). Push down on the ring (B) while pressing in on the tabs (C).
  See Figure 4.
  Figure 4. Opening the processor removal tool latches
2. Lower the tool over the system processor module while ensuring that the two guide pins (A) insert into the alignment holes (B) on each side of the tool.
  See Figure 5.
  Figure 5. Lowering the removal tool onto the system processor module
3. With the removal tool sitting on top of the system processor module, push down on the ring (A) to close the latches (C) and lock the system processor module into the tool. Make sure that both of the tool jaws are locked on the system processor module.
  See Figure 6.
  Figure 6. Locking the system processor module into the tool
Holding the outside of the tool, lift the tool and system processor module from the socket. Place them at an angle in the top cover of the system processor module packaging, as shown in Figure 7.

Note: Set the tool and system processor module at an angle on the top cover of the system processor module packaging. That makes the module easier to pick up and place into the package.

Figure 7. Placing the tool at an angle on the top cover of the packaging
Open the latches that hold the system processor module in the supplied removal tool (A). Push down on the ring (B) while pressing in on the tabs (C).
See Figure 8.
Figure 8. Releasing the system processor module from the tool
Remove one screw (B) from each side of the middle support (A).
See Figure 9.

Figure 9. Remove the middle support side screws
Unscrew and remove 22 screws at locations (A), (B), and (C) from the system backplane and supports.

The screw locations are shown in Figure 10. The screws at (A) are the shortest. The screws at (B) and (C) are longer and secure the pipe supports.

The three metal pipe supports at (B) and (C) need to be kept. They are used on the replacement system backplane.

Figure 10. System backplane screw locations
Using the two blue handles (A), lift the system backplane (B) straight up to remove it.
See Figure 11.
Figure 11. Lifting out the system backplane
Place the system backplane on the ESD mat.