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LED55T18GP有时开机灰屏有时开机正常

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Post time: 2019-8-6 12:13:47
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LED55T18GP或47T18GP有时开机灰屏有时开机正常,经检查为主板图像格式处理BGA虚焊,用BGA焊台补焊后情况后大多数情况正常,但有时候还是灰屏或屏竖带,已经排除逻辑板和屏故障,可确定就是BGA接触的问题,网上有人说50元可包修好,请教各位师兄,这个BGA到底该如何处理才能完全修好,如图

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Post time: 2019-8-12 09:30:07
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此机可以修复,倍频芯片拆下来重新植球就可以了,前提是要排除倍频芯片后面的数据通信电阻一定要正常!
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 Author| Post time: 2019-8-6 12:18:12
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此问题为海信该机芯通病,补焊BGA不能彻底解决问题,已发现多台,有师傅说是BGA芯片焊点或主板焊点氧化,需要拆下来刮掉氧化点重新植球,我没有试过,一朋友为海信厂里的维修工,他说没办法修,报废,我也搞不清楚,希望大家指点下,谢谢!
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Post time: 2019-8-6 18:16:16
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xinxiang 2019-8-6 12:18
此问题为海信该机芯通病,补焊BGA不能彻底解决问题,已发现多台,有师傅说是BGA芯片焊点或主板焊点氧化,需 ...

重新植球,试试呗。
没办法修报废,啥情况?
有机会想自己确定。你说呢?
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Post time: 2019-8-13 17:28:17
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该机主板后面有个导热垫,导热垫覆盖一排电阻。重点检查一排电阻。
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