It is difficult to find the fault point, such as brush error 53. The first thing that comes to mind is the fingerprint identification fault, but the disconnection of the power reset signal line of the main board of the power chip may lead to error 53, so it is meaningless to measure the corresponding resistance and voltage against the circuit diagram to determine the fault. At present, the welding of high-end mobile phone capacitors and resistors needs the help of a microscope, and the manual requirements for maintenance masters are also higher. "It takes ten years to step off the stage in one minute", and the maintenance master may have practiced for three years to replace the font chip in 40 minutes. Therefore, the introduction of mobile phone maintenance is easy to master. If you want to learn mobile phone maintenance well, you need a good mobile phone maintenance tutor to take you into the business and decorate you. Mobile phone maintenance also requires you to think more, think more, learn more and do more. This is the problem that the instructor of Changsha Hongxiang Mobile Phone Maintenance Training School has been emphasizing!