Abstract: A fastener has an integral retention mechanism, which is affixed to the fastener without the need for EDM slots along the length of the fastener. The integral retention mechanism reliably secures the fastener to a panel until it is desired to remove the fastener, in which case the fastener may be easily disengaged without any additional tools. The fastener has an axial aperture having an opening in the tip of the fastener, and axially aligned openings along opposing sides of the fastener which penetrate through to the axial aperture. A u-shaped spring mechanism is disposed within the axial aperture, with a portion of each leg outwardly extendable through the axially aligned openings to provide a retention mechanism.

Abstract: System and method implementations for testing a cooling fan in an electronic device are disclosed. As one example, a method of testing a cooling fan of a sample electronic device is disclosed that includes generating an audio input at an audio speaker and receiving an audio output at an audio microphone to obtain an audio output signal. The method further includes processing the audio output signal to identify frequency modulation in the audio output signal, and identifying a state of motion of fan blades of the cooling fan based, at least in part, on the frequency modulation.