* Light problems and improper lighting management: battery indicator lights aren’t working, display backlighting isn’t adjusting to ambient light changes, keyboard backlights not working, etc * Power management and battery problems: Mac isn’t turning on, sleep isn’t working, random shutdowns and reboots, battery isn’t charging, Mac won’t wake from sleep, etc * Issues with your Mac cooling fans and fan management: the fans run constantly at high speed, fans run high despite low CPU usage and adequate ventilation, fans not working at all, etc Resetting a Mac SMC is particularly effective if you’re having the following types of problems: Typically, an SMC reset helps to resolve many power and hardware related issues that are otherwise unresponsive to troubleshooting techniques. When & Why Reset SMC on a Mac? Some Common Hardware Reasons Oh, and apparently this seems to be a problem frequently experienced by owners of 2012 13-inch Macbook Pros (my model exactly).We’ll show you exactly how to reset the SMC on any type of Mac (and any version of Mac OS X) and the type of problems that it may resolve. It is in Italian, but what the tech does is pretty clearly demonstrated, and someone in the comments section explains it in detail.īasically, you insert something non-conductive underneath the bottom RAM slot, and that stabilizes the RAM so that the laptop stops this lines, freeze, shut-down, 3 beeps thing.ĭo yourself a favor and watch this video! I followed the instructions yesterday and my laptop is back to its old, reliable self. I was just considering the necessity of purchasing a new laptop that I currently cannot afford AT ALL, when I came across this video: This is REALLY a pain because a laptop is supposed to be portable. If I tried to restart it, yes, that’s right: 3 BEEPS!
At first, the 3 beeps would sound if I moved my laptop to another room, but soon, I only had to look at it wrong and then I’d get lines across the screen, everything would freeze, then my laptop would shut down. I tried physically reseating my RAM and that worked for a while, but the problems reappeared and the frequency increased.
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