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These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. You can release the keys after about 20 seconds, during which your Mac might appear to restart. Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. 5 Beeps – Processor FailureTroubleshoot CPU, motherboard. 4 Beeps – Timer FailureTroubleshoot motherboard. 3 Beeps – Memory Error (first 64KB)Reseat/replace memory.

What does 2 long beeps mean on a computer?Ģ Beeps – Parity ErrorReseat/replace memory, troubleshoot motherboard. The new beep codes emit only memory failure symptoms.

This beep code tells you that the computer encountered a memory problem. Now only no memory failure conditions generate the beep code, the beep pattern is 1-3-2 (1 beep, then 3 beeps, then 2 beeps). If you only have one stick of memory it is very difficult to diagnose. Three long beeps followed by two short beeps is a memory initialization error.

Macbook pro 3 beeps reseat ram