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Apple Computing Products:
macOS - Notebook Hardware
3 beeps on Startup, but runs perfect on Target Mode?
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<blockquote data-quote="bobtomay" data-source="post: 1537143" data-attributes="member: 24160"><p>Can only guess at this point that you're interpreting something differently as POST beeps. The POST codes are produced while checking the system board and are before it gets to the point of selecting a boot device.</p><p></p><p>If you're able to press the option key and get to the point of selecting a boot device, whatever you are hearing is well after the time you would be getting the POST code beeps.</p></blockquote><p></p>
[QUOTE="bobtomay, post: 1537143, member: 24160"] Can only guess at this point that you're interpreting something differently as POST beeps. The POST codes are produced while checking the system board and are before it gets to the point of selecting a boot device. If you're able to press the option key and get to the point of selecting a boot device, whatever you are hearing is well after the time you would be getting the POST code beeps. [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
3 beeps on Startup, but runs perfect on Target Mode?
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