I decided that instead of calling Apple back, I would try fixing this myself since it appeared to be a software issue not a hardware issue. The technician booted up the laptop using the special Apple network diagnostics and all of the hardware 'checked out' as just fine.

I called Apple to schedule a visit with my local Apple authorized technician, in Redding, CA).

I proceeded to re-seat the RAM and run a RAM diagnostics test ('rember' from Kelley Computing, ), the test passed. During that time the front LED would flash at the same pattern.īecause I had replaced the RAM (came with 4, wanted 8, but didn't want to pay the Apple price, so instead I bought from - they are amazing) I had suspected that maybe the RAM was bad or that it wasn't seated properly. the battery went completely dead while the computer was asleep, causing it to resume from the sleep image file when power was plugged in) when I would bring it out of safe sleep it would make it 50% through the resume process and then I would get 3 tones/beeps separated by about 5 seconds and then repeating the same sequence. 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 ran into an issue with my wife's MacBook Pro (Early 2011, 2.0 i7) where anytime it would go into safe sleep (i.e. 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. There was no liquid damage on board with 3 beeps. 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 not booting