So is the new spectrum router working on any device? Many times those also have integrated routers. May have missed it in your description.

You already did the hard reset which usually clears the DHCP tables (ensure its a full factory reset not just the hard restart). A power surge could have messed something up but id bet its now just with the handshake on the.new device.

Worth noting that torubleshooting like this is one of the best uses of AI (rec claude, often cleaner results).

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth