Studio Display (2026) Power Supply Boards

Before You Begin

Danger

Ensure that the AC power cord isn’t plugged into an electrical outlet.

Remove the following part before you begin:

Tools

  • Adjustable torque driver (0.3–1.2 Nm)

  • ESD-safe tweezers

  • Nylon probe (black stick)

  • Torx Plus 6IP 25 mm bit

  • Torx Plus 8IP 25 mm bit

Refer to a full list of tools required for all repairs.

Removal

Note: If you’ve already completed the removal steps, skip to reassembly.

  1. Use the 0.3–1.2 Nm adjustable torque driver and 6IP bit to remove the two 6IP screws (923-14138) from the long bus bar. Remove the long bus bar and save it for reassembly.

  2. Use the adjustable torque driver and 6IP bit to remove the four 6IP screws (923-14138) from the short bus bar. Remove the short bus bar and save it for reassembly.

  3. Pinch both sides on the DC power supply board end of the power supply signal cable. Then slide the end of the cable out of the connector.

  4. Gently peel the other end of the power supply signal cable to release the adhesive between the cable and the power factor controller (PFC) power supply board.

    • Caution: The cable is still connected to the PFC power supply board. Be careful not to damage the cable during this step.

  5. Pinch both sides on the PFC power supply board end of the power supply signal cable. Then slide the end of the cable out of the connector.

  6. Use ESD-safe tweezers to peel the polyester film tab away from the power supply signal flex cable.

  7. Use ESD-safe tweezers to flip up the locking lever on the power supply signal flex cable connector. Then slide the end of the power supply signal flex cable out of the connector.

  8. Use the adjustable torque driver and 8IP bit to remove the six 8IP screws (923-14141) from the DC power supply board.

  9. Lift the DC power supply board out of the housing.

  10. Use the adjustable torque driver and 8IP bit to remove the six 8IP screws (923-14141) from the PFC power supply board.

  11. Lift the left side of the PFC power supply board from the housing as shown. Lift the board only enough to access the AC power inlet flex cable connector on the back of the board.

    • Caution: The AC power inlet flex cable is still connected to the PFC power supply board. Be careful not to damage the cable during this step.

  12. Pinch both sides on the end of the AC power inlet flex cable. Then slide the flex cable out of the connector.

  13. Lift the PFC power supply board out of the housing.

    • Important: If you’re removing the power supply boards for a different procedure, removal is complete. If you’re replacing the power supply boards, continue to step 14.

  14. Use ESD-safe tweezers to peel the polyester film tab away from the power supply signal flex cable connector on the back of the DC power supply board.

  15. Use ESD-safe tweezers to flip up the locking lever on the power supply signal flex cable connector. Then slide the end of the power supply signal flex cable out of the connector. Remove the cable and save it for reassembly.

Reassembly

  1. Slide the end of the AC power inlet flex cable into the connector on the back of the PFC power supply board.

  2. Position the PFC power supply board into the housing and align the board with its screw mount as shown.

  3. Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 0.75 Nm. Then use the adjustable torque driver and 8IP bit to reinstall the six 8IP screws (923-14141) into the PFC power supply board.

  4. Turn over the DC power supply board. Slide the end of the power supply signal flex cable into the connector. Flip down the locking lever. Then press the polyester film tab to adhere it to the flex cable.

  5. Position the DC power supply board in the housing as shown.

    • Caution: Ensure that the power supply signal flex cable isn’t trapped under the DC power supply board or logic board.

  6. Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 0.75 Nm. Then use the adjustable torque driver and 8IP bit to reinstall the six 8IP screws (923-14141) into the DC power supply board.

  7. Position the long bus bar between the PFC power supply board and DC power supply board as shown.

    • Important: Align the hook on the end of the bus bar with the notch on the PFC power supply board.

  8. Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 0.45 Nm. Then use the adjustable torque driver and 8IP bit to reinstall the two 6IP screws (923-14138) into the long bus bar.

  9. Position the short bus bar on the logic board.

    • Important: Align the hooks on the end of the bus bar with the notches on the logic board.

  10. Set the torque value on the 0.3–1.2 Nm adjustable torque driver to 0.45 Nm. Then use the adjustable torque driver and 8IP bit to reinstall the four 6IP screws (923-14138) into the short bus bar in the order shown.

  11. Slide the end of the power supply signal flex cable into the connector on the logic board. Use ESD-safe tweezers to flip down the locking lever. Then press the polyester film tab to adhere it to the end of the flex cable.

  12. Slide both ends of the power supply signal cable into the connectors on the power supply boards.

  13. Press the power supply signal cable in the location shown to adhere it to the PFC power supply board.

Reinstall the following part to complete reassembly:

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