So yesterday my keyboards didn't want to work. So I reinstalled everything again and then it worked, but the letter O was showing only capatalized and when I pressed shift it would give the letter O and when I tried to type a question mark or quotation marks using the shift keys the windows would minimize. Then, researching on what to do next I found that some people found reseting the RAM should help. So I did, I removed the batteries, held down the power button for 5 sec..and so on. After that my MacBook didn't want to turn on. I've tried everything on the Apple Support page, but still nothing. I was wondering if anyone had this problem before and what to do.