MacBook Pro :: 3 Beeps On Start Up Mar 22, 2012. Got it with 3 beeps issue have tired reflow ram replace PCH no luck I decide to replace CPU because it was getting crazy warm.Īfter replacement (I remove same CPU from Donner board) with was liquid damage but I was getting a display but it was too badly corroded to fix and many things doesn't work properly.Īfter CPU swap laptop is turning on with no beeps but there is no display no chime fan is spinning I measure board and no power on a main rails. I have replaced the RAM with RAM I know is good and it still beeps 3 times and doesnt boot. Info: Macbook Pro, Mac OS X (10.6.7), We also support apple xserves. Press the power button for 10 seconds to force shut down your MacBook. There was no liquid damage on board with 3 beeps. Hold down the power button and the Option - Command - P - R shortcut keys simultaneously for about 20 seconds. You can ask someone to help you to ensure the operation is correct. Release the keys once you hear the second startup sound from your MacBook.

I have thinking maybe CPU is not connected properly but I bit worried with next soldering attempt it will die as to many times heated up.

I tried also turn on laptop on SMC bypass and all missing rails have a right voltage only PPVCORE_S0_AXG2_L & PPVCORE_S0_AXG1_L are not present.Īny ideas ? Is any chance that something else could cause this issue.

Macbook pro 3 beeps when starting