Hi everyone, I purchased a 2011 13'' Macbook Air (128 GB) last Friday. All had been working great until yesterday night. I opened the screen to wake the computer from sleep and it started beeping very loudly. It was 3 long beeps, a few seconds pause, 3 long beeps again, a few seconds pause, etc...this persisted until I decided to give it a hard reset. After it booted back up, everything worked just as it had...and since then I have not had any problems. I looked up the problem and apparently it usually happens when the computer is trying to boot but detects a problem with the RAM. (http://support.apple.com/kb/ht1547) 3 beeps means there are "no good banks". Should I be concerned? If the problem has not happened again, does this mean it was just a fluke? I called Apple tech support and they told me to do an SMC reset (which I did) and call them back if it happened again. I am still within my 14 day exchange window, so I am wondering if this seems like a serious enough potential problem that I should swap it for another MBA. Thank you for all your help and advice!