3 years of light use and this MacBook die .I believe the SSD is fry because I can't find it any more in the disk utilities or holding command +R same think, according to many users this MacBook have the same issue ,the problem is the SSD is weld it in the logic board the only way to fix it is replace the logic board and looks that is very difficult to do it, any ideas or any solutions for this problem..The logic boards are very expensive please share thank you...