I`ve the same problem after changing the “IO-Board” because of a missing camera clip.
the printer booted as a new printer with a other ID but I can`t connect/binding the printer.
The network infos and the password are submitted to the printer, but I cant bind it, not with Bambo handy neither bambu studio. most the time “no valid device” and at the bambu studio errror 400 no valid device.
The work-a-round with the handy hotspot, same es normal wlan “no valide device”
I beginning to think the new IO board I got from the support is some kind of defect.
With the old board, I had no problems beside the not connectable camera …
sorry for a maybe stange english, its not my mother language 