If your Macbook Air or Macbook Pro computer refuses to start, this article will list the steps to follow in order to overcome this problem. The update will be done automatically, you don't have to do anything. She spilled water on it and now when you attempt to power it on the screen remains blank and you hear 3. One long beep when the Power button is pressedĭon't worry, if your Macbook Air or Macbook Pro computer emits a long tone when the power button is held down, it simply means that an EFI ROM update is in progress. 1 Hello, I am trying to diagnose what is wrong with my SO's Macbook Pro (Late 2012). Your Mac will automatically shut down at the end of the process and restart on its own when the ROM is repaired and functional. Please do not try to shut down or manipulate your Macbook Air or Macbook Pro computer during the ROM restore process. A progress bar will then appear on your Mac screen during this recovery operation. On newer Macs, the ROM is automatically restored.
If your Macbook Air or Macbook Pro computer is broadcasting three long tones, three short tones then again three long tones, it means that the EFI ROM is corrupted and your Macbook Air or Macbook Pro computer is trying to restore. Three long beeps, three short beeps, and three long beeps on a Macbook Air or Macbook Pro computer
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