For this I sometimes I must investigate in depth to find out where the device may be as sometimes there is now assigned user to the device.
I wneud hyn weithiau mae'n rhaid i mi ymchwilio'n fanwl i ddarganfod ble y gall y ddyfais fod oherwydd weithiau nid oes defnyddiwr wedi'i neilltuo i'r ddyfais.