Chosen Solution
Hi Community, All of a sudden my laptop wont turn on, wont charger etc. just nothing. Is there any diagnostics that I can do myself without sending to apple store or local guy? It seems as though it’s the battery, no keyboard lit up, nothing. I have a multi-meter fyi and I have the fixit screwdriver kit. Can I test the battery taking off the back cover? Thanks! Al
For kernel_task taking up 500% of CPU power, I would: Back up the drive if you haven’t. To do this:Shut Down your Mac if it isn’t already off.Connect a hard drive or solid state drive via USB.Press the power button. Immediately, start holding Command+R.Keep holding Command+R until you see MacOS Utilities.Choose Disk UtilityCreate a partition on the external drive(Mac Format)Choose “Restore”For the source, select Macintosh HD(or whatever your MacOS partition is called)Wait. This process may take a few hours.Once the restore is done, exit Disk Utility and Shut Down or Restart the computer.Reset the SMC: Disconnect the AC Adapter, hold the power button for 5 seconds, then reconnect battery and AC adapter and power on the machine. What happened after completing step 2?
both software and hardware errors may lead to this case. firstly, you may take out the removable battery and plug it with outlet. If it doesn’t help, it means it’s not battery problem. Then, try resetting SMC: Make sure the Mac is shut down. Plug the USB cable to the Mac and power source. Press ‘‘Shift + Control + Option + Power keys together for 10 seconds. Then, press Power to turn on the Mac. Check more details.
