Bangjian PM900NIBP system error

Hello, Bangjian PM900NIBP system error may have the following reasons (from the network): 1, communication error, which may be that the communication chip is damaged, or there is no data, that is, the numerical control part is damaged; If there is something wrong with the analog amplifier, there may be no output signal. 2. If necessary, use an oscilloscope to check the output waveform. 3. Program loss is very rare, but it is not excluded. 4. When the machine is started, the module detects the pressure (two pressure sensors, quick release and slow release). If the pressure detection is wrong, the module cannot be initialized, and the initial data sent to the main CPU is wrong, which may be a pressure sensor error. However, I still suggest that the subject consult the buyer or seek the advice and help of professionals, so as to accurately find out the mistakes and repair them, and the medical instruments should not be sloppy, hoping to help the subject.