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Twentieth Anniversary Mac Teardown

What you need

  1. Twentieth Anniversary Mac Teardown, Logic Board: step 1, image 1 of 1
    • Use the release tabs to remove the rear cover

  2. Twentieth Anniversary Mac Teardown: step 2, image 1 of 1
    • Remove any ComSlot II or PCI cards that may be installed and their risers.

  3. Twentieth Anniversary Mac Teardown: step 3, image 1 of 1
    • Unplug the logic board connections to the PRAM battery and fan.

    • Remove the PRAM battery from it's Velcro mounting.

    • Remove the four #0 Philips screws securing the hard drive and processor fan assembly.

    • Remove the hard drive and processor fan assembly.

  4. Twentieth Anniversary Mac Teardown: step 4, image 1 of 1
    • Remove the two T6 Torx screws securing the A/V input board.

    • Remove the A/V Input board

  5. Twentieth Anniversary Mac Teardown: step 5, image 1 of 1
    • Remove the white plastic shield

    • Remove the T6 torx screw securing the logic board to the frame.

  6. Twentieth Anniversary Mac Teardown: step 6, image 1 of 2 Twentieth Anniversary Mac Teardown: step 6, image 2 of 2
    • Turn the TAM around with the front facing you.

    • Use a spudger to gently loosen the speaker covers from their press-fit snaps. Remove the speaker covers.

  7. Twentieth Anniversary Mac Teardown: step 7, image 1 of 1
    • Remove the six T8 torx screws securing the front case to the rear case.

  8. Twentieth Anniversary Mac Teardown: step 8, image 1 of 3 Twentieth Anniversary Mac Teardown: step 8, image 2 of 3 Twentieth Anniversary Mac Teardown: step 8, image 3 of 3
    • Gently pull the tabs toward the center to release the latches hold the front and back together. These tabs are fragile but release easily. Use caution.

    • Lean the top forward and lift up to pull the front case from it's bottom latches.

    • DO NOT TRY TO REMOVE THE FRONT CASE. It is still connected to the back case by several wires and cables.

  9. Twentieth Anniversary Mac Teardown: step 9, image 1 of 3 Twentieth Anniversary Mac Teardown: step 9, image 2 of 3 Twentieth Anniversary Mac Teardown: step 9, image 3 of 3
    • Disconnect the pink and white backlight inverter cable and the black and white right speaker cable from behind the floppy disk drive on the right side.

    • On the left side, disconnect the 50-pin SCSI ribbon cable, analog audio cable and power cable from the CD-ROM drive.

    • Disconnect the black and white left speaker cable.

    • Disconnect the flat, orange display data cable.

    • Open the top case to the left like a book. There will be one more 50-pin cable to disconnect from the front control panel board.

  10. Twentieth Anniversary Mac Teardown: step 10, image 1 of 1
    • The easiest method to remove the logic board is to remove it with the tuner card and cabling.

    • Disconnect the five cables illustrated.

  11. Twentieth Anniversary Mac Teardown: step 11, image 1 of 1
    • Remove the T10 torx screw and extract the stiff wire cable brace from the left side

  12. Twentieth Anniversary Mac Teardown: step 12, image 1 of 1
    • Carefully peel back the tape securing the cables to the white, plastic logic board cover. Pull the cables back to reveal the back side of the logic board.

    • Remove the five T10 screws holding the logic and tuner boards to the back case.

  13. Twentieth Anniversary Mac Teardown: step 13, image 1 of 3 Twentieth Anniversary Mac Teardown: step 13, image 2 of 3 Twentieth Anniversary Mac Teardown: step 13, image 3 of 3
    • Lift the logic board from the left edge then straight up to remove it from the rear case.

    • The logic board slides out of the cabling connector.

Conclusion

To reassemble your device, follow these instructions in reverse order.

7 other people completed this guide.

Dylan

Member since: 02/04/13

511 Reputation

1 Guide authored

4 Comments

Hi,

One of the member of my Forum is looking for the Bose subwoofer including the power cable. Have you an idee on where could he find it ?

Thx.

Raziel

vitalisfrance - Reply

It's missing the step to remove the two torx screws on the upper back side, below the cover with all the holes, after Step 5

Deagol - Reply

Dose anybody know what goes in the top-most chip slot that is empty? Is that for an L2 Cache chip?

garo211 - Reply

To echo the comment from 2014, i just performed this guide and there is a critical step missing between steps 6 & 7. The small plastic grille at the top rear needs to be removed; There are two tabs at the bottom and two on the sides. Flex it to remove. Then remove the two visible torx screws to release the top.

coryheisterkamp - Reply

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