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MacBook Pro (Sandy Bridge 2011) beeping without start-up.
My 13" (Sandy Bridge 2011) MacBook Pro is beeping and not starting up.
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RohanBhade's pick
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
From: https://support.apple.com/kb/HT1547
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
From: https://support.apple.com/kb/HT1547
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