Example 3 When a CNC lathe is equipped with FANUCO-TD system, CRT flickers and shines frequently in debugging, and there are no characters. We find that the main reasons are as follows: 1) CRT brightness and gray knob vibrate in the course of transportation. 2. The system has not been initialized after leaving the factory. The main board and storage board of the system have quality problems. The solution can be as follows: Firstly, adjust the brightness and gray knob of CRT. If there is no response, initialize the system once. At the same time, press RST and DEL keys to start the system. If CRT still does not display properly, the motherboard or storage board of the system needs to be replaced.

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