M1 Mac mini no internet, either wireless or ethernet
My 2020 M1 Mac mini has suddenly quit being able to get on the internet. i still have my old mac mini and it hooks up to the internet just fine, using the same wireless hub, or, if I want, via ethernet. I removed the wireless router and hooked both up using just an ethernet switch. The old computer continues to work just fine, while the M1 still has no internet access.
At one point yesterday, before I hooked up via ethernet, the M1 did pick up a wireless signal from one of the other buildings on the property (I first set it up in that building last year when I got the computer so it has that password as well as the password at the current location). I've tried to repeat that connection but it now says it is too weak to use (it is 250 feet away). But regardless, I am now hooked up via ethernet now, and it still does not work. I've reset the IP address, both automatically and manually, to no avail. The IP address does not conflict with any other device (iPhone, an Amazon Echo and an Amazon Fire tablet). I gave my old iPad Pro away last month. Bad timing.
But it gets even stranger. When I had the wireless router set up, both of the Amazon products had wireless connectivity (as well as the old mini). With the wireless router removed from the system, neither Amazon product has connectivity, so they were not getting a signal from elsewhere. My M1 AND my iPhone did not have wifi connectivity. My iPhone works fine with other routers in other locations though. And it works fine using the cell signal.
I've not tried to move the M1 to another location, though I obviously should. But if the ethernet is not working, something is very wrong regardless.
I do have a new wireless router on order and should get it in a few days. In the meantime, is there anything I can do, like check settings or something?
Losing only wireless or only ethernet would confuse me far less than losing both at the same time. Do I just have a fried circuit in my computer?
Mac mini, macOS 11.4