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厦华高清怪故障

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Post time: 2020-11-2 20:22:47
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顾客拿来一台MT-2985厦华高清电视,说打不开机,拆机后发现电源块有两个引脚虚焊,补焊后上电试机,厦华的logo出现在蓝屏上,本以为完事大吉,谁知接上AV信号,蓝屏变成黑屏{字符正常显示},也无伴音,换一个AV接口再试,故障依旧,拔掉视频线,恢复蓝屏,插上视频线,黑屏。。。
请师傅们帮忙分析一下故障原因,谢谢先!

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Post time: 2020-11-6 19:10:07
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重点检查沙堡脉冲,加速极调高看情况
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 Author| Post time: 2020-11-8 19:05:07
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泰华林 2020-11-6 19:10
重点检查沙堡脉冲,加速极调高看情况

感谢师傅胡回帖!
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