LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳、泛紫，維修。

<font data-keep-original-tag="false" data-original-attrs="{"style":""}" size="6" style="color: rgb(0, 0, 0); font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">今天 <span style="-webkit-text-stroke-width:0px; color:rgb(0, 0, 0); display:inline !important; float:none; font-family:arial; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-decoration-thickness:initial; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">最是美好 ，因為昨天已過，而明天尚未到來！

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">各位早安！ 這裡是—KAO．atun（高雄．阿唐）專業液晶維修，哇細 ─曾仔～

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">一起來看今天的液晶電視維修分享，主角是：

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">LG（樂金）型號：43LK5700PWA

<span style="-webkit-text-stroke-width:0px; color:rgb(0, 0, 0); display:inline !important; float:none; font-family:arial; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-decoration-thickness:initial; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">這是本機器的故障現象：

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">開機啟動有影像，只是這等畫面，看久了恐怕會把電視砸壞！ <a data-original-attrs="{"data-original-href":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVCiZM7iesg0W0rj5TCbvhRHBKxRWcQkssP-QsWnhSz0I3epqX4yf_Ho39UuTi2WH20YjmCi7yhPONf4I-TsOl4mNTArfCTRVj-Ko_lM5RUn4A6zxqDD6S2Xh61r6tczM40kQFK7pe4TdfLA0VfzgP2nT6uQMcwRXVpvg-O3klQugVO5wAhW_PGm5cM38/s1302/batch_20250116_152255.jpg","style":""}" href="https://draft.blogger.com/blog/post/edit/8360646754429671356/7857899359690139770#" style="margin-left: 1em; margin-right: 1em;"><img alt="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" border="0" data-original-height="782" data-original-width="1302" height="384" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVCiZM7iesg0W0rj5TCbvhRHBKxRWcQkssP-QsWnhSz0I3epqX4yf_Ho39UuTi2WH20YjmCi7yhPONf4I-TsOl4mNTArfCTRVj-Ko_lM5RUn4A6zxqDD6S2Xh61r6tczM40kQFK7pe4TdfLA0VfzgP2nT6uQMcwRXVpvg-O3klQugVO5wAhW_PGm5cM38/w640-h384/batch_20250116_152255.jpg" style="cursor: move;" title="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" width="640">

畫面暗陳，影像泛紫：

這是它的內部電路分佈：

拆蓋後！

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">再一次測試，從機器內部縫隙的透光，可以察覺都已經泛紫色！ <a data-original-attrs="{"data-original-href":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilb2RPEpJujztHVsVaAI3oOtXIgWsTL9rUPHMtOB6oavM5Fx9dUa6KnHbL0OmmjstyDyi80at1BKND_-OedtgsrkfIva9Dt6RQtoqeLXT2aAnQ2R3OIgoCs5m426OVucL7c3VZPGFOBff7uIMxVlt1liTuOy6JmUld-PzGmo36-qUEh_NKenIRFal1p4Q/s1302/batch_20250116_153407.jpg","style":""}" href="https://draft.blogger.com/blog/post/edit/8360646754429671356/7857899359690139770#" style="margin-left: 1em; margin-right: 1em;"><img alt="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" border="0" data-original-height="782" data-original-width="1302" height="384" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilb2RPEpJujztHVsVaAI3oOtXIgWsTL9rUPHMtOB6oavM5Fx9dUa6KnHbL0OmmjstyDyi80at1BKND_-OedtgsrkfIva9Dt6RQtoqeLXT2aAnQ2R3OIgoCs5m426OVucL7c3VZPGFOBff7uIMxVlt1liTuOy6JmUld-PzGmo36-qUEh_NKenIRFal1p4Q/w640-h384/batch_20250116_153407.jpg" style="cursor: move;" title="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" width="640">

這是燈箱內部背光源老化，拆解面板、更新背光源進行中～

這樣的功耗，會讓背光源受不了的：

這時，我得一併將背光源的額定電流調降：

更新背光源後的內部透光，就是正常的『正白光』

<a data-original-attrs="{"data-original-href":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqmoPe4w2yufSQoW8sh_00-92XucXpI0GLnfZnvJcbxBiGOX2qKof4Re5DnxWa-bXEWAuvEXI8HkuQZnBTu3LiWqrKLzBPZgzT3LBUqEtCvbobpzL0XfBcaBkhGAIZCh8ZYBVJoVbuDSRRvs_lk2XwPO0llqjKyE88qXkAN7btODCWePIk1Z-zM7ErqIE/s1302/batch_20250116_165719-1.jpg","style":""}" href="https://draft.blogger.com/blog/post/edit/8360646754429671356/7857899359690139770#" style="margin-left: 1em; margin-right: 1em;"><img alt="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" border="0" data-original-height="782" data-original-width="1302" height="384" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqmoPe4w2yufSQoW8sh_00-92XucXpI0GLnfZnvJcbxBiGOX2qKof4Re5DnxWa-bXEWAuvEXI8HkuQZnBTu3LiWqrKLzBPZgzT3LBUqEtCvbobpzL0XfBcaBkhGAIZCh8ZYBVJoVbuDSRRvs_lk2XwPO0llqjKyE88qXkAN7btODCWePIk1Z-zM7ErqIE/w640-h384/batch_20250116_165719-1.jpg" style="cursor: move;" title="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" width="640"> 調降額定電流後，會讓背光源爽爽的作功！因為功耗很低。 <a data-original-attrs="{"data-original-href":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSVc1kVLtChXSdcFkWbfKe7c9JoUjdnP3-HMNMmNpryG1hyphenhyphen27wAT8IGByDQ65So1Am_W2uxEJ3fBpYm9kGtyijSKiMxJEf2CWFgc3SJTldcl0rBrj5gRWYNdCmdJ054eQ6lvnMGdRGyteTSTAPfSS4JWKfT5bIw4yEyGPictx4uzDQ3C8unEHbNFvsxuY/s1296/batch_20250116_170051-1.jpg","style":""}" href="https://draft.blogger.com/blog/post/edit/8360646754429671356/7857899359690139770#" style="margin-left: 1em; margin-right: 1em;"><img alt="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" border="0" data-original-height="1296" data-original-width="811" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSVc1kVLtChXSdcFkWbfKe7c9JoUjdnP3-HMNMmNpryG1hyphenhyphen27wAT8IGByDQ65So1Am_W2uxEJ3fBpYm9kGtyijSKiMxJEf2CWFgc3SJTldcl0rBrj5gRWYNdCmdJ054eQ6lvnMGdRGyteTSTAPfSS4JWKfT5bIw4yEyGPictx4uzDQ3C8unEHbNFvsxuY/w400-h640/batch_20250116_170051-1.jpg" style="cursor: move;" title="LG（樂金）型號：43LK5700PWA ，啟動後，影像暗陳" width="400">

整機組裝，熱機中～

提供參考，請多指教！

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Kao．atun LCD 液晶專修

高雄、屏東液晶『電視』維修；高雄、屏東液晶『螢幕』維修～收件地址：高雄市鼓山區中華一路247巷5弄8號曾仔… 故障圖照上傳『LINE』～ ID：0928029525