| 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! |
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| UPDATE: This happened to me a second time two months later: I have found a firm fix for my issue now: |
| 1) power off, plug in power cord |
| 2) Hold (left side) command + (left) option + P + R |
| 3) while holding them, tap power and CONTINUE HOLDING the four buttons in 2 |
| 4) Computer will make a startup sound, KEEP HOLDING, computer will turn off, KEEP HOLDING, computer will startup again, you can let go only AFTER the second startup or even third startup. |
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| These are other things I tried the first time around:
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| 1) "Hold Command+P+R simultaneously and press power button" (Pedro above) |
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| 2) Technique 1 followed by "hold D and power for 20-30 seconds" (relveston above) |
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| 3) "Holding down D for about 20-30 seconds -- and power simultaneously -- Then press power " (textractor above) |
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| 4) Perform SMC reset and re-verify |
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| Shut down the computer. |
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| Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected. |
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| On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. |
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| Release all the keys and the power button at the same time. |
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| Press the power button to turn on the computer. |
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| Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC. (PlotinusVeritas from Apple help forums) |
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| 5) Shut down your Mac. |
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| Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4. |
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| Turn on the computer. |
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| Press and hold the Command-Option-P-R keys before the gray screen appears. |
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| Hold the keys down until the computer restarts and you hear the startup sound for the second time. |
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| Release the keys. (PlotinusVeritas from Apple help forums)
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