![]() ![]() Consult your system manual or the Apple website for the specific type of memory required by your Mac, and make sure the chip(s) are firmly inserted in the slot(s) and held down by the clips on either side of the slots. If you recently installed or upgraded your RAM chips, the probablem could likely be that you installed the wrong chips, inserted them incorrectly or have bad RAM altogether. One beep means no RAM was found at all, two beeps mean the type of RAM installed is incompatible with your system, and three or more beeps could mean serious problems. The reason your Mac is beeping at you is because something is wrong with its memory. ![]() The flashing LED is directly connected to the audible beeps if you heard 2 beeps you'll see 3 flashes, if you heard 3 beeps you'll see 4 flashes, and so on. After the beeps, the screen will stay black, the system's LED light will flash and you'll be unable to start the operating system. If everything goes fine you'll boot into Mac OS, but if not, the system will emit a set of beeps. Each time you start up your Mac after a complete shutdown, the system performs a self-test before booting the operating system. ![]()
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