Thanks for responding, but I think it is more than weak signal.

As I mentioned, I can take my PC to within 1 meter and get no response. I even tried to connect by Direct Ethernet (I have it set up to allow), but there was no response from the Pi. If I had to guess, I'd say it was some software issue that is causing a lockup or crash, but as I can't connect into the Pi as it is happening, I am unable to diagnose.

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