The rubber plunger’s main job is to push the key back up so if the issue is the key press is not being detected it might be another problem. In my case my R key was sometimes not detected or double registered. The trace (the metal lines that carry the keyboard signals) looked dirty. It was the R key on a 2015 MacBook Pro 15” with USA layout and it was the trace doing to the right. I used a very small flat head screwdriver and pushed it under the thin plastic layer that is on to of the trace and scrape the dirt away a few times. Then the key registered correctly.
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The main job of rubber plunger is to push the key back up so if the issue is the key press is not being detected it might be another problem. In my case my R key was sometimes not detected or double registered. The trace (the metal lines that carry the keyboard signals) looked dirty, black instead of silver. It was the R key on a 2015 MacBook Pro 15” with USA layout and it was the trace doing to the right. I used a very small flat head screwdriver and pushed it under the thin plastic layer that is on to of the trace and scrape the dirt away a few times. Then the key registered correctly.
Unfortunately I had messed with the plunger a little to see if there was any dirt under it and half is now not stuck down so now I need to see if it will be ok or needs to be glued back on fully.
The rubber plunger’s main job is to push the key back up so if the issue is the key press is not being detected it might be another problem. In my case my R key was sometimes not detected or double registered. The trace (the metal lines that carry the keyboard signals) looked dirty. It was the R key on a 2015 MacBook Pro 15” with USA layout and it was the trace doing to the right. I used a very small flat head screwdriver and pushed it under the thin plastic layer that is on to of the trace and scrape the dirt away a few times. Then the key registered correctly.
Unfortunately I had messed with the plunger a little to see if there was any dirt under it and half is now not stuck down so now I need to see if it will be ok or needs to be glued back on fully.