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Hello — I’ve had this Mac mini since 2011 when I bought it brand new. We had a bad thunderstorm one day, and I believe that’s when the computer started acting up. I took it to able and it was literally 5 days out of Apple Care and they refused to look at it. I ran Apple Diagnostics and everything has a passing score. I’ve tried resetting PRAM and SMC and still no luck. I can try them again if you think that should do the trick. I recently upgraded my system drive to an SSD from IFIXIT, and installed macOS Sierra. I went in System Information and here are the things it does not detect: No Bluetooth foundNo Card Reader found(Diagnostics passes)No Ethernet Card foundUSB is detected, but only two of the four usb ports work. All four draw power, like I can charge my phone on the ports that don’t have data going through them, but I can’t plug an external HDD or mouse in that port. It won’t work, but power works. You guys seem like experts here — can someone please help me? Thank you.
Ouch! Sorry guy the lightning storm fried your logic board. Not much you can do here other than replace the logic board. Some of the components on the logic board got damaged from the lightning strike. While it might be possible for someone to diagnose what parts need replacing its beyond what a DIY or even what I attempt to do any more. There are a few board level repair services like PowerBookMedic which you could try to see if they can fix it. Otherwise you’re talking about replacing the logic board. Here’s the IFIXIT guide you’ll need to follow to take the logic board out: Mac Mini Mid 2011 Logic Board Replacement and here’s the Apple part numbers for the different versions of the board: 2.3GHz Dual-Core - 661-60322.5GHz Dual-Core - 661-60332.7GHz Dual-Core - 661-60632.0GHz Quad-Core - 661-6034