Tuesday, 26 November 2013 15:11

Error Beeps At Start Up

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The chime you hear when you start up your mac is notification of sucessful completion of the power on self-test. This test runs whenever the computer is turned on after being fully shut down (the power-on self-test does not run if the computer is only restarted).
If a fault is detected during the test, you will not hear a normal startup chime. Instead, the system will beep. 

Below are the beep codes. If your mac is switched to silent then the beep codes may present as flashing lights on the portable devices. !, 2 or 3 beeps are easiest to fix with replacement memory needed. 4 and 5 beeps are usually more costly with replacement hardware such as the main logic board needed. We can help you what ever the issue so please give us a call.

1 beep = no RAM installed

2 beeps = incompatible RAM types

3 beeps = no good banks

4 beeps = no good boot images in the boot ROM (and/or bad sys config block)

5 beeps = processor is not usable

Read 111709 times Last modified on Monday, 02 December 2013 12:21