In one embodiment, when a problem with a consumer electronic device owned by a user is identified, a diagnostic procedure is provided to control the diagnosis of the potentially faulty consumer electronic device by a testing consumer electronic device. Inventive HNTTBMY1 polypeptides and polynucleotides and methods for producing such polypeptides by recombinant techniques are disclosed. The module is connected to the neighboring module with the guide rail being engaged with the guide rail of the neighboring guide rail.