故障:刚开机时蓝屏,过一会图象和蓝屏交替闪烁,时间稍长后正常. 原因CPU行脉冲输入端外围1微法电解失容,换之故障排除. 总结： 行同步脉冲是否正常是CPU检测和判断图象信号是否正常的标志,此电容失容会使行脉冲因耦合受阻而减弱甚至丢失,导致CPU误判为无信号而切换成蓝屏静噪状态. 出处! |
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