Some people have a strong interest in debugging PCB circuit boards, just like programmers solving bugs. There are many common PCB circuit board problems, including circuit board design, damage to electronic components, circuit shorts, component quality, and PCB circuit board wire breakage.

　　Common PCB board failures mainly focus on components, such as capacitors, resistors, inductors, diodes, triodes, Field-effect transistor, etc. The integrated chips and crystal oscillators are obviously damaged, and the more intuitive way to judge these component failures can be observed through the eyes. There are obvious burning marks on the surface of electronic components with obvious damage. For faults like this, simply replacing the faulty component with a new one can solve the problem.

　　Of course, not all electronic component damage can be observed with the naked eye, such as resistors, capacitors, transistors, etc. In some cases, the damage cannot be seen from the surface and requires the use of professional inspection tools for repair. Common inspection methods include multimeter, capacitance meter, etc. When a certain electronic component's voltage or current is detected to be outside the normal range, It indicates that there is a problem with this component or the previous component. Replace it directly and check whether it is normal.

　　If a component is broken, it can be detected by both eye observation and instrument detection. However, sometimes when we attach a component to a PCB board, we may encounter situations where the detection fails but the circuit board cannot function properly. Many beginners encounter this problem and have no choice but to make a new board or buy one. In fact, when encountering this situation, many times it is due to the coordination of various components during the installation process, which may lead to unstable performance.