Hello Guys, I own a MacBook Air mid-2014 (non-retina) 128 GB. Recently there was an update in macOS 10.12.x. I left my laptop for update overnight and found to be dead on morning. Went to apple care and came to know that my SSD is dead! Well, I thought it may be a co-incidence that the SSD died just after OS update ( as OS update is a software stuff and shouldn't be affecting the hardware issues). Due to apple's high charges, I collected my laptop and got a second-hand SSD installed from local vendor (he took out the SSD from another mac air in front of me). Well the laptop seems fine and working smooth till I updated it AGAIN ! DAMN ! The SSD again died after update !!!! Well now I am confused what is the reason, how can a software update crash a SSD. My laptop doesn't boot at all, I have tried the troubleshooting points mentioned on forum and other websites. (Doesn't even boot in safe mood) Anyone with similar experience or advise what to do ?