Systems, methods, and computer-readable media for determining the temperature of a light-generating component of a display assembly using a voltage of the light-generating component are provided. In one embodiment, a method for operating an electronic device, which may include an external surface and a light-emitting diode operative to emit light for illuminating the external surface, may include detecting the forward voltage of the light-emitting diode, calculating the temperature of the light-emitting diode using the detected forward voltage of the light-emitting diode, and altering the performance of the electronic device based on the calculated temperature of the light-emitting diode. Additional embodiments are also provided.