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In the current method of fault detection and diagnosis for a certain type of electronic equipment, not only the process of obtaining testing data is too time-consuming, but also fault diagnosis is too inefficient. In order to solve these disadvantages, a fault diagnosis system for the electronic equipment based on LabVIEW and PXI bus technology is designed and developed. The system can obtain working parameters from different electronic equipments in real-time, and complete the fault detection and diagnosis process online. The experimental results show that the system has the advantages of data acquisition with high speed, testing with high efficiency and fault diagnosis with high accuracy. The results of practical application show that, with the operation simpleness and portability, the fault diagnosis system is an ideal tool for testing and diagnosing this electronic equipment.