Maybe the line in the machine is empty or broken. 2. The components on the motherboard are broken and short-circuited. 3. The link display board of the motherboard is broken, and the buttons are broken. Solution: First, check whether the power supply is electrified and whether the patch panel is electrified, and test with other electrical appliances. The brand of wall-breaking machine is different. Please check whether the switch of the wall breaker is not pressed. When the wall-breaking machine does not work, it is suggested that it can be eliminated in the same way to see what the reason is and determine what the problem is. If there are many faults in the wall breaker, or it is invisible to the naked eye, it is necessary to disassemble the wall breaker and check it again. It is suggested that it is best to give it to the after-sales maintenance personnel of the brand of the broken wall machine, which can be repaired after being disassembled. When the wall-breaking machine is not working, it is recommended not to continue forced operation. If forced to continue working, the failure of the broken wall machine will often be more serious.