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Show 4 more comments. I took out the logic board and placed it in the oven on degree F for 8 min. Let it cool for 30 min put the computer back together and it started up with on problems. Well, I am surprised. I went through all the answers on this site in order of difficulty, and after cleaning off and replacing the thermal paste with no joy, I ordered a new logic board.

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Only after I had the old one out did I find I had ordered the wrong version of the logic board. Did not fit. So as a sort of WTF, I went ahead and baked my old one then reassembled things. I needed to do that just so I did not lose parts while hassling a replacement of the replacement board, so what the heck. And it booted up!

So what I take from this is that there may be a number of factors that can cause the 3 beeps, and Apple had a number of small revisions over the life of this model, so don't expect a simple "one answer" fix. Thanks, Nikhil! Put the logic board 8 minutes in the oven with degree celsius - was booting again fine afterwards: This is a fun read: I can add a me too here. Did the thermal paste with no luck. Baked my logic board and it f-ing worked again. So awesome. Show 17 more comments. He was able to solve his problem by cleaning the old thermal paste and applying fresh paste.

In any case this is not something you can do your self. Pedro Aspiazu. I also experienced the 3 beeps with no further computer function. The Air then started without the beeps but with a blank screen. After several attempts to restart, I used the hold "D" key down with Powerup.

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I had to hold the "D" key for over 30 seconds, then the computer started as normal. So far it has experienced no further odd behavior. Great that it worked for you, good job. I got 3 beeps nonstop. So as I read here, I pressed D key and power up simultaneously. The beep stopped and it s working again. Thanks for the tip xx.

Cled Tayamen. Tayamen is right, this points to a RAM problem. But unfortunately the Airs RAM is soldered to the logicboard. You may have to change it. And i don't wanna to give a lot of money for nothing so i decided to do everything which i know and to fix it or trow it in a garbage. I have tried thermal paste, have checked the memory chips on logic board, soldered the new one, but again the same.

The problem was that thermal sensor which is on the small board and glued to the logicboard i don't know why they do like that have take apart from it and touching the metal part of cooler and making a short circuit. I had glued back again, put the paste and cooler and, woala, air is on the air again hehe.

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I have a macbook air that most of the time wouldn't boot, the light turned on, but then everything did shut off with a click. I had reassembled the mac when it started doing this. Somehow I figured out that when I did not assemble the heatsink it would boot ok, but ofcourse would get too hot after a while. After even more testing, it turned out that the tiny screw in the middle of the heatsink that holds a V shaped clamp, was the cause. When I had that screw tightened, that macbook air wouldn't boot.

With a click and then powered off. Remembering this answer of ZDRAVKO I could conclude that somehow this heatsink screw was interfering with the temperature sensor and causing the macbook to turn of immediately. I couldn't find any case of shortcircuiting, but I did notice that one of the cables of the temperature sensor was routed above a hard square motherboard chip-thingy.

When the heatsink was totally fastened, that would get squeeshed there and probably short-circuit or do something else bad. When I put that cable aside it, where it probably belonged, the boot error was solved!! Hello, the picture is missing ohh, I replace the thermal paste, I can't locate by my self the thermal sensor. No pictures in Internet. Holding down D for about seconds -- and power simultaneously -- stopped the beeps. Then I pressed power and it booted right up. My guess is that the mac air overheated from too much video work was moving large video files around and using iMovie.

My daughters MacBook was doing the beeping and I did replace the memory but it kept doing it. Big thank you! This thread has become a dump for MacAir 3 beep solutions so here's my addition: I worked through the following non-invasive techniques most listed above a couple times each and after doing 5 it started booting.

Maybe they worked as a combination or maybe it was 5 that did the trick. If none of these had worked I'd have tried the Thermal Paste solution above. However, if non-invasive works, who am I to complain! Hopefully this compilation helps someone! This happened to me a second time two months later: I have found a firm fix for my issue now:.

Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected. On the built-in keyboard, press the left side Shift-Control-Option keys and the power button at the same time. PlotinusVeritas from Apple help forums. Locate the following keys on the keyboard: You will need to hold these keys down simultaneously in step 4.

Hold the keys down until the computer restarts and you hear the startup sound for the second time. OK, I have an older MacBook air model a that chimes then about 10 seconds later 3 beeps over and over. I pulled the logic board and looked it over with a magnifier several times and it's real clean no parts look bad so I put on new thermal paste and still have 3 beeps BUT I figured out by timing the boot process, turn it on and after it chimes and when the screen lights up push power to turn it back off then hit power a second time and it boots fine.

I did this about 20 times and it boots that second time every time. So when I want to use it, hit power, wait for the chime and hit power to turn it off then hit power to boot. Don't know why it works but for this MacBook, it just does. Tried booting with the disk drive out and same thing so it's not a software issue, something with the board but at least I got it to boot.

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Just FYI, when you power it on and it chimes and as soon as the screen lights up it is approx. Clumzy Lowk. Resoldered all the ram chips with flux cleaned with denatured alcohol and blew out any remaining liquid with electronic blower and voila 3 beeps gone video right away and did pram reset 4 times to clear it out and bam all 4gb ram detected.

Do you have any links or pictures or something to describe how exactly you "resoldered the ram chips with flux" such as which parts did you resolder and where did you blow out remaining liquid? I've had 2 MBA's with the startup problem 3 beeps. After reading all the answers above there are different solutions. Common problem is the memory but it is not always a hardware problem like disturbed connections, etc. In my experience both MBA's it had to do with a software problem: Failure with the sleepmode. It's the swapfile which fails in a kind of way.

If that fails the MBA won't boot and reacts with 3 beeps.

I've tried to startup in all thinkable ways, mentioned above. Sometimes they booted up. If it was a hardware problem they should never boot so it must be something else. I discovered that when you can make the MBA complete out of power in all components especially the SMC it will boot normally. Taking out the logic board or recharge the thermal paste or baking in the oven, all methods make the logic board complete out of power. That cleans the swapfile and takes away the startup problem.

After reassembling the MBA's did boot normally without the 3 beeps. It's my experience and not THE solution but just an opportunity. Good luck and please respond if you have any comment, positive or negative. We can all learn. Parupkar Jasuja. I had the same issue just now and I was looking for a solution in this forum, unfortunately I didn't find it.

I've tried everything you have and I even put my logic board in the oven to perform a reflow and even that was no help. What everyone experiencing this problem should try exactly this! But it ended up being a RAM issue. So please try this even if you think that RAM isn't the issue because I doubted it would work but now my Macbook is up and running!!! Larry Knibb larryk Mine booted with the battery disconnected, i. First time scared the!

Left it overnight on charge and it booted fine in the morning Thought maybe some dust came loose overnight which un-shorted the RAM. Kicked myself for not thinking of that the first time. A few successful OS updates later, I thought maybe it had grown out of the 3 beeps issue but last night it happened again for the third time. Too impatient to wait overnight so was playing around and found I could boot it up just fine with the back off, battery disconnected but the power cable attached.

When the OS update completed on mains power only, I shut down, reconnected the battery and was back to the 3 beeps. So now I'm back to my original theory that it's dust and the plugging and unplugging simply moved the machine around a bit and partially dislodged the dust. After a bit more agitation it came back to life. Haven't restarted yet.

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Might not restart for a while: Download this gem of an app: CoconutBattery take a screenshot of the main window and past it into your answer. When I checked it in the morning it showed an error that I needed 8. I freed up some space so I have 20GB free and the update worked, but that's when the beeps came back. You'll need to reformat your drive! So backup your apps and data using TimeMachine on an external drive. The next issue is restoring as you have to much stuff for such a small drive you'll need trim back your stuff or get a larger SSD.

Not sure I understand the connection? I'm using the computer right now with no issues unless or until I reboot, perhaps. Wouldn't I be affected right now by virtual memory corruption? My understanding of virtual memory is that it's a software-driven function of the main OS kernel at runtime. Whatever the issue is, it's only an issue in the first one second of rebooting the computer. The main OS hasn't loaded at that point. The bootloader doesn't use virtual memory and I'd be surprised if the hardware RAM integrity check during POST which may even occur before the software boot sequence runs is checking the software-managed virtual memory swapfile on disk and reporting out on corruption there.

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Inger inger Both times, after it hit , would then turn off with a dark screen with the 3 beeps. I have only used my laptop several times since I got it 2 years ago.

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I found this thread last night, what a help!! Also what worked was command-option P and R and power all at the same time. Let me add after reading the above, the 3 beeps occurred right before I installed an update. See the range.

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