MacBook Pro (13-inch, M1, 2020) Bottom Case
Before You Begin
Warning
Read Battery Safety and follow workspace and battery handling guidelines before you begin.
Tools
Battery cover
Bottom case fixture
C-clamps
Cut-resistant gloves
ESD-safe tweezers
Nylon probe (black stick)
Pentalobe screwdriver
Permanent marker
Suction cups
Torx T5 screwdriver
Important
This procedure requires a replacement battery management unit (BMU) cover.
Removal
Place the computer on a clean, flat surface with the bottom faceup.
Use the pentalobe screwdriver to remove the two long pentalobe screws from the rear corners of the bottom case.
Note: The screw color is specific to your model.
Silver (923-05203)
Space gray (923-05200)
Use the pentalobe screwdriver to remove the two pentalobe screws from the front corners of the bottom case.
Note: The screw color is specific to your model.
Silver (923-05204)
Space gray (923-05201)
Use the pentalobe screwdriver to remove the two short pentalobe screws from the middle of the bottom case.
Note: The screw color is specific to your model.
Silver (923-05205)
Space gray (923-05202)
Position the bottom case fixture on a table with the red lever facing you.
Place the two C-clamps on the bottom left and bottom right of the bottom case fixture. Ensure that the sliding bars of the C-clamps face down toward the floor. Squeeze the handles to tighten the C-clamps.
Position the corner braces inward.
Tighten the silver thumbscrews.
Ensure that all sliding locks and rollers are fully open and the red lever is flipped down.
Place the computer in the bottom case fixture with the bottom faceup and the display hinge facing away from you.
Push the four sliding locks inward to hold the computer in place.
Press the two rollers inward.
Put on the gloves. Then press the suction cup to attach it to the lower left corner of the bottom case.
Four clips inside the bottom case attach it to the top case. Pull up the handle of the suction cup until you feel the two internal clips on the left release.
Lift up the edge of the suction cup to release it.
Move the suction cup to the lower right corner and press the top to attach it to the bottom case.
Pull up the handle of the suction cup until you feel the two internal clips on the right release.
Lift the edge of the suction cup to release it. Slightly lift the bottom case to create a narrow opening between the bottom case and top case on the side facing you.
Caution: Don’t lift the bottom case more than 0.5 inch.
Grasp the bottom case from both sides. Ensure that the opening doesn’t exceed 0.5 inch.
Apply gentle and steady force to pull the bottom case toward you less than 0.5 inch to disengage the spring fingers.
- Caution: The spring fingers can release suddenly. When they disengage, don’t allow the bottom case to drag over internal parts.
Rest the bottom case on the top case.
Remove the gloves and push the two rollers outward.
Lift the bottom case from the computer. Set the bottom case faceup on a clean, flat surface.
Note: If you’re replacing only the bottom case, skip to reassembly step 10.
Important
If you’re replacing the bottom case, keep the original bottom case until the repair is complete.
Use a permanent marker to write the computer serial number on the inside of the replacement bottom case.
A replacement bottom case may have a red tube in the airloops as shown. Grasp one end of the red tube and pull it out of the airloop gasket. Discard the red tube.
Lift the BMU cover off the BMU board. Discard the BMU cover.
Place the battery cover on the battery. Then press the black tabs into the clips on the top case until you feel a click.
Push out the four sliding locks.
Lift the computer from the bottom case fixture.
Place the computer on an ESD-safe surface.
Gently peel the polyester film tab off the locking lever of the BMU flex cable.
Use the flat end of a black stick to flip up the locking lever.
Use ESD-safe tweezers to gently grasp the end of the BMU flex cable and slide it out of the connector.
Use ESD-safe tweezers to gently move aside the BMU flex cable. Then use the T5 screwdriver to remove the T5 screw (923-05241) from the BMU.
Reassembly
Move aside the BMU flex cable. Then use the T5 screwdriver to reinstall the T5 screw (923-05241) into the BMU.
Slide the end of the BMU flex cable into the connector (1). Then flip down the locking lever (2).
Press the polyester film tab to the locking lever (3).
Place the computer in the bottom case fixture. Ensure that the display hinge faces away from you.
Push the four sliding locks inward. Don’t push the two rollers.
Hold the battery cover by the edges and lift it off the top case.
Use the black stick to remove any residual foam and adhesive on the BMU board.
Remove the adhesive backing from the replacement BMU cover.
Press the BMU cover to the BMU flex cable.
Position the bottom case so that its front edge rests on the shelf of the lower two sliding locks.
Align the back of the bottom case with the vent/antenna module. Ensure that the long edge of the bottom case is flush with the smooth plane of the vent/antenna module.
Important: There should be equal space where the bottom case and top case meet.
Note: Ensure that the two rows of spring fingers inside the bottom case align with the metal tabs on the vent/antenna module wall.
Lightly press the back center of the bottom case while slowly pushing up the red lever. Feel the spring fingers lock as you press the bottom case.
- Caution: Pushing the red lever too far can bend the bottom case or damage the lever spring.
Flip down the lever as soon as the rear corners of the bottom case meet the rear corners of the top case.
Put on the gloves. Then use the gripping texture of the gloves to gently align the bottom case with the display hinge and top case.
Important: If the bottom case doesn’t align, pull it toward you to remove it. Then repeat steps 10 through 14.
Four clips inside the bottom case attach it to the top case. Press both sides of the bottom case simultaneously (1) until you feel the side clips snap into place. Then simultaneously press the two areas in the middle (2) to attach the two remaining internal clips.
Push the four sliding locks outward.
Remove the computer from the bottom case fixture.
Note: Ensure that the lever is down to protect its inner spring before storing the bottom case fixture.
Ensure that all sides of the bottom case align with all sides of the top case. If the cases are misaligned, begin again at removal step 8.
Use the pentalobe screwdriver to reinstall the two short pentalobe screws (1, 2) into the middle of the bottom case in the order shown.
Note: Use the correct screw color for your model.
Silver (923-05205)
Space gray (923-05202)
Use the pentalobe screwdriver to reinstall the two long pentalobe screws (3, 4) into the rear corners of the bottom case in the order shown.
Note: Use the correct screw color for your model.
Silver (923-05203)
Space gray (923-05200)
Use the pentalobe screwdriver to reinstall the two pentalobe screws (5, 6) into the front corners of the bottom case in the order shown.
Note: Use the correct screw color for your model.
Silver (923-05204)
Space gray (923-05201)
Caution
After you’ve completed all reassembly steps, depending on the part replaced, Repair Assistant may be available on the device and is recommended to finish the repair. Learn how to initiate Repair Assistant.
If you replaced the logic board, the computer will start up in diagnostics mode until you complete Repair Assistant.
If you replaced the Touch ID board, it will function only as a power button until you complete Repair Assistant.
If you replaced the lid angle sensor, the computer may not sleep or wake correctly until you complete Repair Assistant.
