X1 box appears dead. Any special process to replace?

My X1 set top box, which I've had for a number of years now, seems to be dead. When we got up this morning it was making a pretty awful grind/buzz sound that makes me suspect that its internal hard drive has died, and it just sits with a `- -` status code on the screen forever. I tried power cycling it at the outlet (gently), but it seems permanently kaput.

Since there are no available upgrades, the "manage devices" page only lets me add a new box, not replace an existing one. The troubleshooting assistant wants to walk through things like attempting a reboot, but I know none of that will succeed. I'm not even sure the unit would receive the command in its current state.

I can't find anything on the site that makes clear whether I can get a replacement by simple walk-in to a local Xfinity store with the dead box. Can I? :)