If that works, just leave the bad RAM slot empty, and go with "what works". The problematic RAM is the main cause of MacBook Air or MacBook Pro beeping 3 times every 5 seconds and won't turn on. Buy an 8gb DIMM and put it in "the BOTTOM slot" (with the back off) If taking out the upper RAM makes the computer "run as it should", then what I would do is: Try to boot and run that way a day or two. Remove the RAM DIMM "nearest to you" (topmost slot with back off). If you're STILL getting the display problems Put the back on and see if that changes anything. Clean off the contacts, then reseat the RAM back into the DIMM slots. This pattern indicates that your Mac has a problem with its firmware and it is being restored to fix it. Three long beeps, three short beeps, then three long beeps again. If you hear this pattern, it means that your Mac’s RAM didn’t pass a system integrity check.
#Macbook pro 3 beeps and continue driver#
take off the back cover (you need a Phillips #00 driver for the screws, and pay attention to where "the long screws" go). Three beeps, then nothing for five seconds, then three more beeps. Might be worth taking it in an having it replaced. In OS X, this (and any other command that makes the bell go off) also gets you a badge if the command is executed when.
#Macbook pro 3 beeps and continue free#
Although this doesn't sound like a problem that would give you "the three beeps".ĭo you have a brick n mortar Apple Store anywhere close?Īpple -used to have- a free replacement program for the ribbon cable in the 2012 MBP's. The cable "wears" the internal connections go bad, or sometimes it even "shorts out" against the back cover.
Also, the SATA ribbon cable that connects the internal hard drive to the motherboard (it's a "known weak" component on the 2012-design non-retina MBP's). RAM slot - intermittent contact from back of case "pressing on" the topmost RAM DIMM (that's why you see it act up when you set it on a surface) If you get "3 beeps in a row" - that's an indication of "RAM troubles".
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