Spent a good bit of the morning trying to resurrect the Xbox 360. It has a weird issue where, about 45 minutes after booting it up, it'll lose access to the WiFi network. Tried all the tips and tricks we found online but nothing helped.
In the end I decided connect it via Ethernet using a pair of old Ethernet over Powerline adapters I had lying around. Amazingly that has done the trick and it's back online without any disconnections.