Hi All, I've been having problems with a used Macbook Pro 2011 I recently bought. The HD was dead so I replaced it with an old macbook drive I had. Things worked fine, but I got a couple of hangs, and then the flashing folder issue on boot. I fixed it by resetting NVRAM (command+option+p+r) It happened again and that time I had no access to internet and didnt remember the combination. So I pressed something I can't remember. It did a reset but not the normal NVRAM reset because I remember a command line showed up reporting whatever it was doing. Now the flasing folder issue appeared again and NVRAM reset doesnt fix it and I can't find anywhere the keys combination for the magic solution I accidentaly applied last time. Was I hallucinating? Does this combination exists?