22
Jan
Imac Long Beep. Newer computers automatically recover from a corrupted ROM. If your iMac computer is having issues booting you will likely hear a series of Mac beep codes similar to a PC BIOS beep code. The iMac does not rely on the power LED to indicate a problem. A looping three beeps in between three seconds during startup is your iMacs way of telling you that the operating system youre trying to boot into is incompatible with your Mac hardware.
4 Beeps No good boot images in the boot ROM. When this occurs a progress bar appears on the screen during ROM recovery mode. EFI ROM corruption is detected and the computer is in EFI ROM recovery mode. 2 Beeps Incompatible RAM types. 9102011 Press and hold the power button for 5 seconds. The iMac does not rely on the power LED to indicate a problem.
I restarted a few more time.
Locate the following keys on the keyboard. Apparently the 1 long beep signifies a RAM issue but when it finally boots up all of the RAM is present and there is absolutely no problem at all with the Macbook - it will run for an entire day without a single crash or problem. Instead the system will beep as explained below. Locate the following keys on the keyboard. Newer iMacs will use tones instead. Its unlikely to be 1 or 2 beeps unless youve been messing around with its insides.