VIDEO OF THE PROBLEM: https://www.youtube.com/watch?v=mCJfNyZVouI&feature=youtu.be So whenever i let my macbook go to sleep for 10+ minutes, the wifi turns off automatically or its on but it can't detect any network. And whenever I try to turn on or off the wifi through system preferences, the wifi refuses to turn back on therefore the only solution is to reset my macbook. I've resetted the NVRAM, PRAM, deleted the bluetooth files that might've associate itself with the wifi, disabled cloud keychain, and even updated my OS to 10.9.4 which was supposed to fix this issue but the problem still persists. My first apple genius appointment he ran the apple hardware test and said the wifi hardware is still working, he told me to come back with a time machine back up Second apple genius appointment, pretty much reinstalled mavericks but the problem came back when i went back home (30 min drive) The second apple genius told me if the problem persists, he might have to keep my macbook for the next 48 hours with the apple store and have a tech throughly diagnosed my computer. So my question is that if I go to the apple store for the third (hopefully final) time, is it possible for me to get a macbook either new or refurbished replaced on the same day? This macbook is my primary computer so I really want to avoid waiting for 48 hours. Oh if it matters the problem also occurs in my windows 8 bootcamp perdition as well. And my warranty is still valid Update 7/23/2014: from the 3rd visit the apple genius deleted the bluetooth preferences again and it doesn't work and he even tried logging on with his apple genius account onto my mac and the problem persisted in there as well. He concluded that its not a software issue and it could either be a logic-board or wifi card problem. Ended up shipping my macbook to texas for 3 days to get the wifi-card replaced but the problem still persists till now. UPDATE 7/24/2014: went back to the apple genius and he said that it's definitely the logic board that needs to be replaced. He was also confused why the apple repair center didn't thoroughly check it. He also reinstalled mavericks just in case that my OS was corrupt before sending it off. The problem appeared again On the fresh mavericks and off to the apple repair center again, looks like I'm macbook less for another 4 days. Also if this is related to the logic board, when I wake up my macbook from sleep, I have a blank black screen so pretty much the screen is not turned on but the apple light in the back appeared. Only solution was to force shut down and reboot. UPDATE 7/30/2014: got my macbook back from the apple store, with the logic board and display assembly replaced. When I received the macbook back from the apple genius, opened it up and the problem still persisted! Had another apple genius to diagnosed my problem and she told me that they'll send it in for repair. BUT she said you've been here five times and she doesn't want to waste my time so she just opened up a new macbook hand it to me! This is a new mid 2014 macbook with a + 0.2 ghz spec bump! Overall happy with apple! And I'm still curious why the problem still persisted with the hardware replacement AND a fresh operating system.