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I've tried all 4 RAM sticks one at a time. But the macbook keeps bleeping how do I know what the problem is? Just once every 5 seconds. Is the RAM holder also replacable? Or is the logic board broken at one beep every 5 seconds
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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
In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
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