My 1.2 GHz 512GB MacBook will not power up, I have just got home and it did seem a bit cold. Not cold enough for any damage but cold. It would not power up so I plugged it in and it made the charging sound. So It seems to still be working, tried a power cycle and no joy. Any ideas? Need it running for A-Levels tomorrow... thanks
-Stone
I’ve had this same issue about three times over the years on my 12” 2015 512GB SSD, 1.3Ghz Macbook. The screen will just go black right in the middle of working, it will shut off and then it won’t power on, usually at the worst possible time but not necessarily when it’s under load. I’ve noticed a pattern that leads to this, however. And a solution that has worked all three times when resetting the SMC and PRAM alone didn’t make any difference.
First, I notice usually a few days before the crash when I go to plug in the USB-C charge cable I will see a static spark between the end of the ground shield on the plug and the MacBook itself right as I go to plug it in. I noticed this a few days before the crash two out of three times it’s happened, so I think it has something to do with the SMC getting scrambled. All I can gather is since the power adapter itself is not grounded, maybe a static charge is being stored in the cable somehow and searching for ground on the laptop, causing a stir in the NVRAM and SMC parameters when it gets connected.
Resetting the SMC with a long 20-30 second hold of CMD + Shift + Option + Power will result in a chime from the speaker that the power is plugged in, but the screen will not light up and no battery indicator will show. Unplugging and replugging the power does the same, but the power button won’t do anything, caps-lock light won’t turn on and no touchpad haptics. If I continue SMC resets, sometimes following the chime the screen will glow a bit then dim, pressing power will make the Apple logo and a load bar show for a few seconds and then it will shut down automatically. That’s as far as it will go until I do the “fix”.
To resolve this issue I use a USB-A (rectangle end) to USB-C cable, plug the USB-A end into a grounded USB port (in this case my iMac) and then the USB-C end into the Macbook. Wait a few seconds for the ground to do its magic and then press the power button. It boots every time. Since I’ve seen this a few times I’ve gone the gamut trying other ways to get the machine to boot but this ends up being the only way to get back in.
I hope this helps someone.