It could be, but it’s fairly unlikely. I’d guess two things, at least initially. First, I’d suspect your router is in some state where it isn’t handing out an IP address, which is keeping the setup of the Sonos One SL to complete the setup, followed by a potential bad Ethernet cable, although that latter part may be moot until you resolve the former. And I’m not sure how or where you can get static before it is connected, unless the static is coming from other speakers. if that’s the case, I’d suspect some sort of wifi interference , and be reading the linked FAQ.
At the very least, try a reboot of the router. it’s certainly also worth trying a separate Ethernet cable.
If that doesn’t work, you may want to then submit a system diagnostic, and call Sonos Support to discuss it.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the phone folks, they have tools at their disposal that will allow them to give you advice specific to your Sonos system and network.