Weird breathing sound but won’t restart on battery drain for Calibrate
Hi, I bought a battery replacement from Ifixit for mid 2012 MacBook Pro retina.. All was going well until I followed the battery calibration process and let the power drain out until the machine shut down. After I plugged the power cord back in, the machine makes a kind of quiet rhythmic breathing noise but will not restart. The breathing noise sounds sort of like a fan starting to whir at startup but after a Half second then it slows and attempts to start again. This cycle continues on and on. Finally after a couple hours i unplugged i. that is the only thing that stops the rhymic very low sound. The sound starts again if I push the power button to attempt a restart while unplugged. Besides the problem of the machine not working, I’m also concerned that the calibration failure will effect the battery. Thanks for your help.
9条评论
What is the color of the MagSafe LED Amber or Green?
由 Dan 完成的
The color is amber. Thanks
由 Allen S 完成的
@danj
The color is amber. Thanks
由 Allen S 完成的
Have you tried an SMC reset? With the machine powered down and the charger connected, hold Shift + Control + Option + Power for about 7 seconds. Then release the power button and the other keys. Then try to power on.
由 Zach 完成的
Yes I tried that. While the shift-cntrl-opt—power keys are down, the breathing sound stops. But when released either with power cord in or out , it does not restart on power button pushed @zpl
由 Allen S 完成的
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