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.

3 If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.

Hold these keys and the power button for 10 seconds. There was no liquid damage on board with 3 beeps. 2 After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. 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 loosen up screws