by WebDevRobert | Jun 5, 2009 | Apple Administrator
Intel-based Macs such as the iMac, Mac mini, MacBook, MacBook Pro, and Mac Pro rely on a combination of tones and blinking LEDs to display Power On Self Test (POST) error codes. If the computer detects no SDRAM (Synchronous Dynamic Random Access Memory, also referred...
by WebDevRobert | Jun 4, 2009 | Apple Administrator
What do the beeps during the Power-On Self-Test (POST) mean? This test runs whenever the computer is powered on after being fully shut down (the power-on self-test does not run if the computer is only restarted). When a fault is detected during the Power-On Self-Test,...
by WebDevRobert | Jun 3, 2009 | Apple Administrator
What do the beeps during the Power-On Self-Test (POST) mean? When a fault is detected during the Power-On Self-Test, you will not hear the normal startup chime. Instead, the system will beep as explained below. 1 beep = No RAM installed/detected 2 beeps = Incompatible...