Same thing here. Proud owner of a Zephyrus M up until about a month and a half ago, when the charger went. Sent it in under warranty (cost me $60 in postage, grr) and got it back 3 weeks later with a new charger. 4 days later, the left-side fan started to rattle. The computer is now out of warranty, so I'm probably facing a hefty BestBuy repair bill to fix that fan, since Asus don't sell replacement parts. I did actually take it apart and clean it out, and I was able to confirm that it's the actual fan rattling and not just a buildup of dust. I guess a bearing broke or something. As much as I love this computer, I am going to sell it as soon as I get this fan repaired, because 2 major reliability issues in my 6 months of ownership is not a good omen.