How to Put Space Bar Back on Macbook

Removing and Replacing the Space

1. If a rectangular-shaped key needs to be removed (for example, if a key is sticking when pressed), always pry it up from the left side—either the upper or lower left corner.

2. Because adhesive is used under the top case, closely inspect the case for any adhesive that may have built up under the keycap. Lift away any built-up adhesive using fine-point tweezers.

3. Test the operation of the scissor mechanism by using a black stick to carefully raise and lower the mechanism.

• If it is installed correctly, the scissor should move smoothly.
• If it is loose, remove it and compare the two parts of the scissor mechanism to the image below.
• The inner piece should pivot smoothly within the outer piece.
• When closed, its profile should be fully flat.
• The slider bar and all four pins should be intact.

4. Inspect the rows of clips on the underside of the keycap.

• If any of the clips are bent, broken, or missing, replace the keycap.
• If the clips are intact, re-use the keycap.

5. Check the rubber dome and raised metal areas inside the keycap opening on the top case.

• When the rubber dome is pressed and released, it should spring back upright. If the rubber dome is off center or damaged, replace the top case.
• If the metal hook that holds the slider bar of the scissor mechanism is bent, try to bend it back to a uniform 90-degree angle. If it is bent or broken beyond repair, replace the top case.
• If the two metal ears are bent, use needlenose pliers to straighten them. If either or both are broken beyond repair, replace the top case.
• If a metal stabilizer bar is bent, try to straighten it.

6. With the scissor mechanism open, install the slider bar under the metal hook of the top case.

7. Allow the scissor mechanism to fold flat and hold the slider bar in place while using a black stick to insert the scissor pins—one at a time—into the top case ears.

8. With the scissor pins inserted, use a black stick to raise and lower the scissor mechanism to make sure it moves freely.

9. Check the keycap well area on the top case. If the bottom stabilizer bar is pushed up, move it down as far as it will go.

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10. Determine which is the top of the Space bar keycap by checking the clips on the inner plane. The top of the keycap has the row of clips that extend closest to the sides of the keycap. These top clips most closely match the longest stabilizer bar at the top of the keycap well.

1. Align the bottom row of clips inside the bottom edge of the keycap with the bottom stabilizer bar.
2. Press and slide your finger along the bottom of the Space bar over the bottom stabilizer bar until you hear the clips click into place. (The keycap is tilted up at this stage.)

13. Press along the top of the Space bar to secure it to the top stabilizer bar. (Listen for the keycap clicking into place.)

14. Press the length of the Space bar to ensure all clips are secure.

15. Check the key from all angles to make sure it is uniformly flat. Press and release one corner of the key. If the key is installed correctly, the opposite corner should respond at the same level (not tilted higher or lower).

Continue reading here: How to Use the Symptom Charts

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How to Put Space Bar Back on Macbook

Source: https://www.macrepaircentral.us/macbook-air-01-2008/removing-and-replacing-the-space-bar.html