1. First, check whether the light bulb is burnt out. How to detect it: The simple method is to install a good light bulb for testing. If the light bulb is burnt out, replace it. board, consider replacing the lighting board.
2. If there is no response after starting the machine, check whether the power supply is burnt. When turning on the machine and reading the power supply, use a multimeter to check whether there is any voltage output. If it burns, there will be no voltage output. It is necessary to change the power supply. The power supply is a core accessory that supplies power to the entire lamp.
3. If the light bulb is good and sometimes bad, it is better to check and replace the light bulb first. If the light bulb is still good and bad after changing, check whether the fan next to the lighting board is broken. If the fan of the lighting board is broken, it will be a phenomenon that the light bulb is good and bad, and it is necessary to replace the fan.
Fourth, if the three problems still cannot be checked, check that the lighting board has a 5V voltage power supply wire terminal, and use a multimeter to measure whether there is 5V voltage reaching it. If not, it is considered to be a motherboard problem, and the motherboard needs to be replaced.