Example 3 A CNC lathe is equipped with the FANUCO-TD system. During the debugging, the CRT flashes and shines, and no characters appear. We found that the main causes are: 1CRT brightness and gray scale knobs vibrate during transportation. 2 The system has not been initialized at the factory. 3 system motherboards and storage boards have quality problems. The solution can be as follows: First, adjust the brightness and gray scale knob of the CRT. If there is no response, please initialize the system once. Press RST and DEL to start the system. If the CRT still does not display normally, then The motherboard or storage board of the system needs to be replaced.

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