Hey all, I've been having this issue where my Macbook Air shuts down randomly. Initially it wasn't that big a deal since it reboots really quickly, but about 2 weeks ago it would be unable to boot up whenever this happens making the computer unusable. Sent it in for repair and the motherboard was replaced. It was good for a day but the next day it happened again and I sent it straight back. 5 days later the technician said he did an update and left it on for an entire day and it did not shut off any more. I asked him what happens then if I collect it and the issue still repeats, and he said that he can arrange for someone to pick it up if it does. Collected it a few days later and used it today. Within less than half an hour it shut off by itself again, and shut down 2 more times while attempting to boot it up. While making an arrangement for the repair centre to pick it up, the Mac suddenly booted up again by itself and it's been fine for the last 10 minutes. Summary: - Laptop shuts down by itself - Sent it in for repair - Motherboard replaced - Issue re-occurs and I send it for repair again - Technician did an update and claimed that he didn't see any more issues - Issue re-occurs yet again I'm getting pretty damn sick of this. I'm a student staying on campus and I have to head home whenever this happens in order to complete my assignments. I have a feeling this isn't going to be an easy problem to solve so is there anything that I can do to simply get them to change the entire unit rather than going back and fourth to the service center? Also I've noticed that the service center (authorized service center, not apple) did not log the problem with Apple the second time I had sent it in. A couple of days ago I called Apple up to enquire on the status of the second repair. Apple had no record of the second repair at all. Is this something that I should be concerned about?