My Snapmaker A350 has completely seized to function

I can heat the bed and nozzle, and the phone works great, but even though I have factory reset it and updated to the latest firmware, none of the axis will move. I cannot print or level the bed for this reason, any attempt gives the error “Something went wrong during the calibration. Please retry or quit.” Any help would be appreciated, I can clarify facts as needed.

First thing to do is always to unplug and replug the cables leading to the linear modules (at both ends), just in case something got jarred loose.

Second thing to do is verify that the linear modules will move if you apply pressure with your hands while the unit is turned off.

Thirdly—what were you doing with the machine just before the problems started? That’s often the key.