This is about my sister's Macbook, I believe from 2010. It's had numerous problems in the past, such as the battery inflating and breaking the case (And Apple expects this, apparently).
The following issue confused the Apple tech that I asked about this to. I know for sure that the Tom's Hardware guys are smarter
Anyway, in April she tried to clean some of her keys with a toothpick, since over the years it got really dirty in there. She didn't turn it on for a week. Then, when she did turn it on, a bunch of the keys did not work. The affected keys were (from my memory): F, G, H, J, K, L, and ;. I then gave her an old Dell USB keyboard from the XP days to use for a while. Suddenly, when she connected it, the built-in keyboard worked again. It stopped again while she was in school and she borrowed a USB keyboard from the library.
After that, it had been on and off. Seems to be completely random. She had to change her password, since it involved those keys and she was unable to log in (Does Mac OS X not have something equivalent to Windows Key + U?).
I can't tell if this is a physical issue, or a software issue. I don't think the affected keys were the only ones she cleaned. Either way, replacing a Macbook keyboard seems impossible, and having Apple do it is, of course, an insane price since it is out of warranty. She would rather buy a new laptop or use my Dell than get a $200 keyboard replacement.
Any ideas on how to fix this? Would be much appreciated.
The following issue confused the Apple tech that I asked about this to. I know for sure that the Tom's Hardware guys are smarter

Anyway, in April she tried to clean some of her keys with a toothpick, since over the years it got really dirty in there. She didn't turn it on for a week. Then, when she did turn it on, a bunch of the keys did not work. The affected keys were (from my memory): F, G, H, J, K, L, and ;. I then gave her an old Dell USB keyboard from the XP days to use for a while. Suddenly, when she connected it, the built-in keyboard worked again. It stopped again while she was in school and she borrowed a USB keyboard from the library.
After that, it had been on and off. Seems to be completely random. She had to change her password, since it involved those keys and she was unable to log in (Does Mac OS X not have something equivalent to Windows Key + U?).
I can't tell if this is a physical issue, or a software issue. I don't think the affected keys were the only ones she cleaned. Either way, replacing a Macbook keyboard seems impossible, and having Apple do it is, of course, an insane price since it is out of warranty. She would rather buy a new laptop or use my Dell than get a $200 keyboard replacement.
Any ideas on how to fix this? Would be much appreciated.