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故障现象:该机收看时,频繁出现蓝屏故障,由其每天早上开机,几秒钟或几分钟出现蓝屏,几秒钟或几分钟后又正常,图像与蓝屏循环变化,出现蓝屏时,也无伴音。有关电路如图1所示。
Symptom: When watching this machine, frequent blue screen failure occurs, the boot every morning, a few seconds or a few minutes blue screen, a few seconds or a few minutes later normal, the image and the blue screen cycle changes, there is no blue screen audio. The circuit shown in Figure 1.