Of course, that thing is called light-emitting diode, English abbreviation is LED, the general sales of electronic components have, lighting is used in high-brightness LED, retail price of about 0.5 yuan a, online bulk purchase is cheaper. Use a soldering iron to weld the original LED that you think is damaged, and then weld the new one on. Note that the LED is to distinguish between positive and negative poles, and the installation is not bright.