LUBA 2: charging station's green status LED goes dark, mower stops docking on its own

The symptom

The charging station's green status LED (normally on constantly, including overnight) goes dark. The mower can no longer navigate back to the dock and return-to-charge attempts fail, in one case triggering fault ² 1200 ("recharge failed"). If you manually place the mower on the dock, charging still works fine: the failure is specifically in the mower's ability to locate the station, not in the physical charging contacts.

What a healthy station looks like, per Mammotion: its own return-to-charge guide says the station's LED should be solid green when the mower is away or not charging, and flash green while it charges³. For a light that is off or behaving abnormally while the station and adapter have power, the guide's checks are the contacts on both mower and station, the cable between station and adapter (unplug and reconnect it), and, with a multimeter, the voltage at the station's contacts and the adapter's output³. It also says that a mower which charges when placed by hand but cannot dock on its own points at positioning, infrared detection, station placement or docking alignment³. That is the general advice for this symptom. The cases below are the ones where the station itself turned out to be faulty.

Five independent reports, no shared firmware version

No single firmware version or cause has been confirmed; this is reported across owners on different builds, and the owners' own diagnoses pointed to a physical charging-station fault rather than a software update that broke something that used to work:

• A five-day-old LUBA 2 lost the green LED entirely; power-cycling the station briefly restored a flicker before it went dark again. Another owner's advice was blunt: open a ticket, the station is dead¹.
• The identical symptom hit a second owner the same day: green light permanently off, mower charges when manually docked but can't find the station on its own. A ticket brought a new station a few days later, and everything worked again¹.
• A third mower drove to the dock normally, then span in a circle and threw the docking-failure error, with the same dark green LED and same timeframe¹. The same owner had opened a thread of their own six days earlier and reported the outcome there: the station was at fault, and a replacement sent after videos to support fixed it². That owner asked outright: "can it really be that so many charging stations die almost simultaneously?", a fair question the thread never answers: its replies get as far as replacing stations, never a common cause.
• A fourth LUBA 2, two months later, had the same dark light. Tapping the station, or pushing the mower in firmly, brought it back for a while. After three weeks of calls, support concluded the station had a problem and sent a new one; the owner opened the old one and found nothing wrong with its wiring or infrared board¹.
• A LUBA 1 owner reported the identical docking-failure pattern with error 1200 ("recharge failed"), independently: same symptom, different model line².

One of the first cases self-resolved without explanation a few days later: the owner suspected an intermittent loose connection inside the station, not a fix they could reproduce on purpose.