Macbook Pro Beeps 3 Times Will Not Boot.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. If this answer is acceptable please remember to return and mark it. If you recently dropped the machine you may have knocked it loose. Whenever I start the game, the MacBook Pro starts flashing the front light and beeping. I just want to know what the problem was? Edit: So the problem is reproducible. After I restarted the system, everything seemed fine. Suddenly, my MacBook made an annoying beep sound and the front light was also blinking. Go through each step one by one and only advance if it still beeps.

For anyone getting 3 beeps at boot, there are a few things you can easily do. Upon booting back up, I would get the dreaded 3 beeps indicating ram failure (according to an employee at a Genius Bar visit) so I upgraded the RAM to 8gb from 4gb myself.

Background: my late 13' late 2011 MacBook Pro was randomly freezing and shutting down or restarting before freezing again and shutting down. 13' late 2011 MacBook Pro freezes and beeps 3 times even after replacing ram.

Macbook pro 3 beeps no boot