Recalibration is mandatory in all cases to finalize a repair, but there may be other prior operations related to the cause of the failure.
Change of screen, opening of the Rog 5, improvement in reading after a long month depending on the conditions of use, after the installation of a screen protector.
It is a kit that can easily be purchased commercially, usually sold without the weight between 10 and 20€, it requires external software or code to perform the calibration in addition to this tool.
It is a tool that will be good to have at home with the generalization of sensors under the screen.
In any case, it cannot repair a reader if a component has burned out, if a cable is disconnected or no longer makes contact (frequent on the Rog 5), so without precision on the circumstances and the test .12345+= that does not help to answer
