My MacBook 2010 restarts immediately when I shut down
Have a Macbook 2010 unibody that restarts when I shut down via Apple Menu. I can shut down only by pressing the power button for several seconds, then it forces shutdown. This happens whether on power adapter or on battery power.
Also, if the power adapter is disconnected after a hard shutdown, the Macbook starts up immediately when I connect the power cable.
I have tried different RAM. I have installed and reinstalled both Yosemite and El Capitan. I have also changed hard drives.
And…. I don’t know if it’s connected to the problem or not, but after a few reboots the AIRPORT card is no longer recognized; it’s as if it isn’t installed. Not available as an option under Networking. A few times there was the Airport icon in the Menu Bar, with an X thru it, but now there isn’t even the icon.
What’s odd is that the Macbook has a Airport/Bluetooth card all in one, and Bluetooth works perfectly. Maybe I accidentally disconnected the Airport cable?
Thanks for any help.