Mac Pro (Rack, 2023) Front Input/Output Board Flex Cable

Before You Begin

Remove the following parts before you begin:

Tools

  • Adjustable torque driver (10-34 Ncm)

  • Nylon probe (black stick)

  • Torx Plus 5IP 50 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.

Removal

  1. Use the 10-34 Ncm adjustable torque driver and 5IP bit to remove the two 5IP screws (923-03412) from the front input/output (I/O) board connector cowling on the logic board side. Remove the cowling and save it for reassembly.

  2. Lift the two ends of the front I/O board flex cable off the connectors on the logic board.

  3. Use the black stick to loosen the adhesive between the front I/O board flex cable and the logic board.

  4. Remove the protective cover from the front I/O board.

  5. Use the adjustable torque driver and 5IP bit to remove the two 5IP screws (923-03446) from the front I/O board connector cowling on the front I/O board side. Remove the cowling and save it for reassembly.

  6. Lift the three ends of the front I/O board flex cable off the connectors on the front I/O board. Then remove the flex cable.

Reassembly

  1. Press the three ends of the front I/O board flex cable to the connectors on the front I/O board.

  2. Position the front I/O board connector cowling over the three ends of the front I/O board flex cable on the front I/O board side.

  3. Set the torque value of the 10-34 Ncm adjustable torque driver to 25 Ncm. Then use the adjustable torque driver and 5IP bit to reinstall the two 5IP screws (923-03446) into the front I/O board connector cowling.

  4. Press the protective cover onto the top of the front I/O board.

  5. Press the two ends of the front I/O board flex cable to the connectors on the logic board. Then press the flex cable to adhere it to the logic board as shown.

    • Important: If you’re installing a replacement front I/O board flex cable, remove the adhesive backing before adhering the flex cable to the logic board.

  6. Position the front I/O board connector cowling over the two ends of the front I/O board flex cable on the logic board side.

    • Important: Ensure that the right side of the cowling is aligned with the edge of the logic board plate as shown.

  7. Set the torque value of the 10-34 Ncm adjustable torque driver to 16 Ncm. Then use the adjustable torque driver and 5IP bit to reinstall the two 5IP screws (923-03412) into the front I/O board connector cowling.

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.

Published Date: