Chosen Solution
A Macbook Pro 13” came today to my work shop because 5 keys wasn´t working, I take off the keyboard ribbon and noticed that the contacts were very uggly, I clean it a little with alcohol and then put it back. Now the only key working is the power key. Do the owner needs a new keyboard or there is something I could try??? We are in Cuba, and it is very hard to get spare parts here.
Not to let anything untried I’d suggest using plenty of good quality flux and heat up nicely the keyboard Zif connector at 250C for a while, being careful not to melt it, rinse with plenty of IPA and blow it with canned air. If you found corrosion on the flat cable there’s certainly also some filth beneath the connector, you might be in luck and be able to recover it with that. If you have donor boards, you might try replacing the connector at once, before purchasing a new keyboard, personally I’d do that first.
Clean the contacts with a pencil eraser and rinse with alcohol. Replace the keyboard Keyboard replacement on mid-2014 MBP Retina
If it were my call I would try a new keyboard. iFixit sells the part but however it cannot be shipped to Cuba. Maybe someone can provide an upper case assembly that can be shipped to Cuba.
