Mac Pro (2023) Logic Board
Before You Begin
Remove the following parts before you begin:
Tools
#1 Phillips screwdriver
Adjustable torque driver (10–34 Ncm)
Adjustable torque driver (0.3–1.2 Nm)
Ethernet cable
Nylon probe (black stick)
Torx Plus 5IP 50 mm bit
Torx Plus 8IP 89 mm bit
Torx Plus 10IP 25 mm bit
Caution
This procedure requires System Configuration. After you’ve completed all removal and reassembly steps, learn how to initiate the System Configuration process.
If you replace the logic board, you’ll need a separate Mac running the latest version of macOS or a separate Mac with Apple Configurator installed to restore the Mac before initiating the System Configuration process.
Removal
Use the 10–34 Ncm adjustable torque driver and 5IP bit to remove the two 5IP screws (923-03412) from the top input/output (I/O) board connector cowling. Remove the cowling and save it for reassembly.
Use the flat end of the black stick to lift the two ends of the top I/O board flex cable off the connectors.
Use the #1 Phillips screwdriver to fully loosen the two #1 Phillips screws on the upper clamp plate. Remove the clamp plate and save it for reassembly.
Note: The two #1 Phillips screws are captive and stay attached to the clamp plate.
Slide all the PCI Express (PCIe) slot covers out of the PCIe slots frame.
Use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the five 8IP screws (923-03419) from the bottom of the logic board.
Apply a piece of painters tape on the bottom left corner as shown to avoid scratching the logic board during removal.
Use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the two 8IP screws (923-03410) from the heat sink cover.
Remove the heat sink cover and save it for reassembly.
Use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the two 8IP screws (923-08637) from the front of the heat sink.
Use the 0.3–1.2 Nm adjustable torque driver and 10IP bit to remove the two 10IP screws (923-08631) from the space frame.
Remove the heat sink shim and save it for reassembly.
Rotate the space frame 180 degrees so the blower is facing you. Use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the four 8IP screws (923-03417) from the top of the logic board.
Use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the four 8IP screws (923-03409) from the left side of the logic board.
Remove the PCIe intake from the logic board and save it for reassembly.
Tilt the logic board toward you and away from the alignment notches on the space frame (1). Then slide the logic board to the right (2) just enough to provide clearance for the Ethernet ports.
- Caution: To avoid damaging the top I/O board flex cable, use the black stick to hold the flex cable away from the logic board while sliding the logic board to the right.
Pivot the left side of the logic board toward you and ensure that you provide clearance for the Ethernet ports.
Important: Don’t fully remove the logic board from the space frame yet.
Slide the logic board out of the space frame.
- Caution: Ensure that the bottom plate screw mounts don’t obstruct the logic board. Ensure that the top I/O board flex cable doesn’t get caught between the logic board and the heat sink.
If you're installing a replacement logic board, use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the four 8IP screws (923-09222) from the logic board plate. Remove the logic board plate and save it for reassembly.
Reassembly
Important
If you’re reinstalling the existing logic board, skip to reassembly step 7. If you’re installing a replacement logic board, continue to step 1.
Caution
If you’re installing a replacement logic board, don’t discard the bracket attached to the top of the replacement part. The bracket must be transferred to the existing logic board before returning to Apple Service to prevent damage during shipping.
Use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to remove the two 8IP screws from the bracket attached to the top of the replacement logic board. Remove the bracket and set it aside.
Transfer the bracket to the same location on the existing logic board. Then use the 0.3–1.2 Nm adjustable torque driver and 8IP bit to install the two 8IP screws into the bracket.
Place the existing logic board inside the reused ESD-safe bag.
Position the packaged logic board in the foam frame.
Close and seal the box. Ship the box to Apple Service.
Position the logic board plate on the logic board. Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 0.5 Nm. Use the adjustable torque driver and 8IP bit to reinstall the four 8IP screws (923-09222) into the logic board plate.
Apply a piece of painters tape on the bottom left corner as shown to avoid scratching the logic board during reassembly.
Slide the logic board into the space frame.
- Caution: Ensure that the bottom plate screw mounts don’t obstruct the logic board. Ensure that the top I/O board flex cable doesn’t get caught between the logic board and the heat sink.
Pivot the left side of the logic board into the space frame and ensure that you provide clearance for the Ethernet ports. Continue to ensure that the top I/O board flex cable doesn’t get caught between the logic board and the heat sink.
Slide the logic board slightly to the left to align the screw holes on the top of the logic board with the screw holes on the space frame.
- Caution: Ensure that the top I/O board flex cable doesn’t get caught between the logic board and the heat sink.
Plug both ends of the Ethernet cable into the Ethernet ports to ensure logic board alignment. Adjust the alignment of the logic board until the ends of the Ethernet cable are easy to insert and remove.
Rotate the space frame so the screws on the side of the logic board are facing you. Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 0.5 Nm. Use the adjustable torque driver and 8IP bit to reinstall the four 8IP screws (923-03409) into the left side of the logic board.
Keep the 0.3–1.2 Nm adjustable torque driver value at 0.5 Nm. Use the adjustable torque driver and 8IP bit to reinstall the four 8IP screws (923-03417) into the top of the logic board.
Reinstall the PCIe intake into the logic board.
Reinstall the heat sink shim.
Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 1.2 Nm. Use the adjustable torque driver and 10IP bit to reinstall the two 10IP screws (923-08631) into the space frame.
Note: The two 10IP screws are reinstalled into the top of the heat sink through the screw holes in the space frame.
Set the torque value of the 0.3–1.2 Nm adjustable torque driver to 0.5 Nm. Use the adjustable torque driver and 8IP bit to reinstall the two 8IP screws (923-08637) into the front of the heat sink.
Reinstall the heat sink cover.
Keep the 0.3–1.2 Nm adjustable torque driver value at 0.5 Nm. Use the adjustable torque driver and 8IP bit to reinstall the two 8IP screws (923-03410) into the heat sink cover.
Keep the 0.3–1.2 Nm adjustable torque driver value at 0.5 Nm. Use the adjustable torque driver and 8IP bit to reinstall the five 8IP screws (923-03419) into the bottom of the logic board. Then remove the Ethernet cable.
Press the two ends of the top I/O board flex cable to the connectors on the logic board. Press evenly along the length of each connector.
Position the top I/O board connector cowling over the two ends of the top I/O board flex cable.
Set the torque value on the 10–34 Ncm adjustable torque driver to 16 Ncm. Use the adjustable torque driver and 5IP bit to reinstall the two 5IP screws (923-03412) into the top I/O board connector cowling.
Slide the PCIe slot covers into their original locations on the PCIe slots frame.
Position the upper clamp plate. Then use the #1 Phillips screwdriver to fully tighten the two #1 Phillips screws into the clamp plate.
Reinstall the following parts to complete reassembly:
Caution
After you’ve completed all removal and reassembly steps, learn how to initiate the System Configuration process.
If you replaced the logic board, the computer won’t start up and the status indicator light will flash amber. Follow the instructions to restore the Mac. Then initiate the System Configuration process.