Why is Mac Mini not starting up
When I turn it on I can hear an extremely faint chime, the light goes on, the fan is blowing, but otherwise it seems dead. Nothing on the screen, no keyboard light (USB). I can turn it off by holding the power button for a few seconds.
I just replaced the battery and gave a a bit of a clean, but to no avail. A few years back I replaced the hdd with an ssd and it worked fine since. The problem started when I tried to upgrade to Sonoma using Open Core Legacy Patcher, which I had success with in the past. But this time it never finishes and I am left with this mess. Any suggestions?