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三星HG65AA795SJ有声无图灰屏

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Post time: 2019-7-21 11:13:34
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本帖最后由 电脑块 于 2019-7-21 11:17 编辑

故障:开机能正常显示SASUNG LOGO,随后灰屏,伴音正常。屏是三星的,逻辑板为AUO。开机瞬间测得逻辑板电压:VIN-15.5V,VGH-27V,VGHC-27V,
VCOM-6.9Vavdd-15v其他3.3v,1.8/1.2v 正常。LOGO显示完无VGH/VGHC、VCOM电压。背光亮成灰屏状态。代换过逻辑板正常播放30分钟后,故障依旧。求助各位师傅是主板还是数据有问题?帮分析一下谢谢

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 Author| Post time: 2019-7-21 21:03:49
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与VGH电压有关的两的IC 分别是AUO P301-16,TR8901BGS, VCOM电压芯片AUO G1422
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Post time: 2019-7-30 13:49:32
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修好没有,如果我没猜错的话应该是屏出现的问题,三星屏这种问题很常见!
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 Author| Post time: 2019-9-2 22:16:05
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还没有搞好呀,不清楚是主板还是电源的问题。15v逻辑板供电偶尔会停止输出,也会影响到5v4A供电,也查不到资料头大。
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