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. 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 have searched up the problem and was told to remove the ram. I tried like 10 times and still got the 3 beeps and nothing else.

When you start your Mac, it will automatically run system diagnostics. If the SIL of a MacBook Air (Original, Late 2008, or Mid 2009) flashes five times when starting up or after waking from sleep, and the pattern repeats after a brief pause, the computers battery may require service. This happened on my Macbook Air and I transferred my data to a Macbook Pro the. Some notes, I know this isnt a ram or hardware issue. Ive searched for this issue already but havent been able to find a solution. There was no liquid damage on board with 3 beeps. It beeps once, 3 seconds pass, then it beeps again-this repeats.

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 this MacBook Pro for repair board 820-3332-A

Macbook pro 3 beeps when starting