In one embodiment, a method of installing a component in an electronic device is described. A light source shines a light through an aperture of on one end of the electronic device. A light sensor positioned on the opposite end moves with a fixture having the component. When the light sensor determines a central portion of the light, the fixture and the component may be aligned with the aperture of the electronic device, and the fixture installs the component. In another embodiment, a method of detecting proper installment of the component is described. A microphone may be used to detect sound transmission from a speaker which transmits sound through the aperture. If the microphone detects sounds from an interface region between the component and the housing, the component is not properly installed.