When the board to be tested is subjected to the blue film test, there are traces of unpricked needles on the test point, how to deal with it?

先观察蓝膜是否平贴PCB板，PCB板是否出现变形翘起，防止扎针时发生偏移，检查针板探针是否正常露出，是否出现探针歪斜或者未植针的情况，蓝膜上或者探针是否有污渍，在压床上下压测试时，是否因为气压不足而使压床下压未到位，探针行程是否在大于1/2与2/3之间.一些测试点需要用不同的型号的探针，观察是否符合要求

First observe whether the blue film is flat against the PCB board, whether the PCB board is deformed and tilted, to prevent deviation during needle insertion, check whether the needle plate probe is exposed normally, whether the probe is skewed or not implanted, whether the blue film or Whether the probe is stained, whether the pressure of the press is not in place due to insufficient air pressure when testing the pressure on the press, whether the stroke of the probe is between 1/2 and 2/3. Some test points need to use different models The probe, observe whether it meets the requirements.