Introduction
After getting my Mini M like most people I disliked the the blue lock lights. After finding out that these are on the membrane and there is no easy way to change I figured this was hopeless, or at least more pain than I wanted. But then it hit me, I dont have to change the leds, I only need to change their color. I figured I could use a partial yellow filter to remove most of the blue but pass greens and yellows.
Using Headlight Film to Change the LED Color
I looked for some plastic filters but didn't want to do these as I would have to glue something to the membrane. After a bit I found vinyl headlight films which will self adhere but can be removed if needed. These films are available on Amazon and other places for less than $10. After a bit of thought I chose a "lime" color film to pass greens and remove more blues than a green film. I think a pure yellow film may work also if it is just tinting film, but a straight green film will just go to blue/green.
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Modifying the Lock Lights
I cut the films into 3 strips about 3in x 1/2in. After some trial and error I found that I needed to stack the three strips to get a full green, less than 3 it was still too blue, more didn't matter. Maybe with pure yellow film you might need less. The film has 2 coverings, one side is non adhesive with a scratch covering and the other covers the adhesive side.
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I removed the scratch protection side from all of them, then stacked them on each other removing the adhesive side and placing them on the membrane over the leds. Later I actually cut them into smaller 1/2in squares to eliminate some light bleed across the strip, but that seems to be an issue with the case design an not the film, squares might help a little bit so light does not travel in the film but not sure. Put some electrical tape between for good measure. The case has alot of space between the membrane and the lock lenses and is not well baffled so I think you will get light bleed no matter what.
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Below is how it turned out. I like the green and it is a touch dimmer than the piercing blue. The slight color bleed is there but I am ok with it, it was there with the blue also. Overall I am satisfied with the mod and it is fairly simple and non destructive so easy to try and change if you don't like. Let me know what you think.
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I will be posting a surprise in keyboards shortly.