Can you elaborate or link-to some more info on "replace the entire key and membrane"? Apple want to replace the top-case at AUD $650...
Failed: compressed air
Failed: cleaning under the key.
Success:
Remove the key (careful, these keys really like to break the bottom u hooks)
Remove the butterfly
Peel off the glued membrane
Cleaned all with 90% alcohol.
Took a new membrane (you might be able to use old) and used E6000 glue and a toothpick to glue it back (don't get the contacts).
Replaced butterfly and key.
Not a good solution, but it worked.
I got the key, butterfly, and membrane from replacementlaptopkeys.com.
It looked like the contacts were getting coated/corroded and not making good contact? Perhaps heat?
Failed: compressed air
Failed: cleaning under the key.
Success:
Remove the key (careful, these keys really like to break the bottom u hooks)
Remove the butterfly
Peel off the glued membrane
Cleaned all with 90% alcohol.
Took a new membrane (you might be able to use old) and used E6000 glue and a toothpick to glue it back (don't get the contacts).
Replaced butterfly and key.
Not a good solution, but it worked.
I got the key, butterfly, and membrane from replacementlaptopkeys.com.
It looked like the contacts were getting coated/corroded and not making good contact? Perhaps heat?