LED fault detection apparatus and method

The invention discloses an LED fault detection apparatus. The LED fault detection apparatus comprises at least one light guide pipe, at least one photoelectric switching circuit, a gating circuit, an electric signal detection circuit and a control circuit. One end of each light guide pipe is positioned close to an LED to be detected, the other end of each light guide pipe is positioned close to one photoelectric switching circuit, and the LED to be detected, the light guide pipe and the photoelectric switching circuit are in one-to-one correspondence; the control circuit is electrically connected with the gating circuit, the LED to be detected is lighted according to actual needs, and the gating circuit is controlled to drive the electric signal detection circuit to perform electric signal detection on the corresponding photoelectric switching circuit; and the electric signal detection circuit is connected with the gating circuit, each photoelectric switching circuit and the control circuit, performs electric signal detection on the corresponding photoelectric switching circuit under the driving effect of the gating circuit and feeds back a detection result to the control circuit so that the control circuit can determine whether the LED to be detected generates a fault according to the detection result. According to the invention, whether the LED generates the fault can be detected timely.