1. 佳能相機1d系列換主板教程

自從液晶電視上市以來，逐漸受到了人們的喜愛，很多人家里都安裝了液晶電視。和普遍的電視機相比，液晶電視比較省電、較為環(huán)保。但是對于電器來說，使用久了，出現(xiàn)故障也在所難免，那么該如何維修呢？

基礎知識

組成結構

液晶電視機的組成原理，大體有4個主要功能模塊電源板，電視主板，邏輯板，背光模塊，以及屏線，遙控器，按鍵輸入和喇叭輸出。

電源板

顧名思義，電源板負責整臺電視的供電。功能好比人的心臟，給人全身輸送能量。如果電源板壞了，就像人的心臟停止跳動，電視機自然就不能工作了。

很多黑屏，背光不亮，指示燈不亮，遙控按鍵不起作用等現(xiàn)象都是因為電源板故障引起。

電視主板

電視主板是整個電視機控制的核心，也可以說是電視的大腦。

如果電視主板出現(xiàn)問題，可能導致指示燈不亮、或者指示燈顏色異常、遙控按鍵無響應、黑屏、花屏等現(xiàn)象。

邏輯板

邏輯板也稱TCON板，是信號中轉站。負責將主板的LVDS信號轉換成屏能處理的TCON信號。

如果TCON壞了，可能導致畫面黑屏，花屏，條紋干擾，屏閃，屏保等異?，F(xiàn)象。

背光模塊

背光模塊的功能是給電視機顯示提供背光光源。

如果電視背光不亮，很有可能是背光模塊出現(xiàn)了問題。

LVDS信號線

屏線，又稱差分信號線。如果接口松動，接觸不良，很容易導致黑屏，雪花點干擾，花屏等異?，F(xiàn)象。

注意：4K電視，因為數(shù)據(jù)量大，LVDS信號線已無法滿足傳輸要求，一般都采用V-BY-ONE的信號線傳輸。

遙控接收頭

遙控接收頭，也稱IR，負責接收遙控器的紅外控制信號。如果按遙控器沒有反應，可能是遙控接收頭出現(xiàn)問題。

按鍵板

如果遙控器可以正常操作，但按鍵板不起作用，估計是按鍵板或者相關電路壞了。

三合一板卡

將背光模塊，電源板和電視主板集合到一塊板卡上，俗稱三合一板卡。將背光模塊，電源板和電視主板集合到一塊板卡上，俗稱三合一板卡。

隨著產品的標準和規(guī)范化，電視模塊將越來越簡化。目前市面上的電視，里面的模塊基本都簡化成兩片電路了，一塊三合一主板加一片邏輯板。

工作原理

如上圖，紅色的箭頭是供電電路，藍色的箭頭是信號電路。

電源板負責將220V交流電壓轉換成各個模塊工作所需的直流電壓；

電視主板負責處理按鍵信號，響應遙控器信號；

控制電源板開關，直接或間接控制背光模塊；

接收各類視頻信號，圖像轉化成LVDS信號輸送給邏輯板；

聲音信號輸出到喇叭；

邏輯板主要功能是將電視主板輸出的LVDS信號轉換成液晶屏能處理的TCON信號；

背光模塊負責給背光燈條供電。

維修常用工具

螺絲刀

螺絲刀是工具，分手動或電動，用于旋擰（安裝）和旋松（除去）螺釘。

鑷子鉗

夾持導線、元件及集成電路引腳等。

萬用表

，萬用表又稱為復用表、多用表、三用表、繁用表等，是電力電子等部門不可缺少的測量儀表，一般以測量電壓、電流和電阻為主要目的。

示波器

示波器是一種用途十分廣泛的電子測量儀器。它能把肉眼看不見的電信號變換成看得見的圖像，便于人們研究各種電現(xiàn)象的變化過程。

溫度可調熱風槍

熱風槍主要是利用發(fā)熱電阻絲的槍芯吹出的熱風來對元件進行焊接與摘取元件的工具。

電烙鐵

電烙鐵是電子制作和電器維修的必備工具，主要用途是焊接元件及導線。

錫絲

錫絲的特質是具有一定的長度與直徑的錫合金絲，在電子原器件的焊接中可與電烙鐵或激光配合使用。

維修技巧

基本維修的方法

直觀法

肉眼觀察燒黑的地方，看有無連接線松動及元器件擊穿的情況。

觸摸法

用手觸摸關鍵部件，觀察供電部分發(fā)熱情況(數(shù)字板)，特別是對老化幾小時后出現(xiàn)的軟故障情況比較實用。

問題法

了解故障出現(xiàn)的具體狀態(tài)(比如雷擊、打火、冒煙、積水及以及人為操作等)。

測量法

使用萬用表、示波器測量(有些情況可用指針式萬用表交流來代替示波器測量一些普通的信號)。

代換法

有條件的情況下，可以代換電源板，數(shù)字板，高頻板，背光板，屏，LVDS數(shù)據(jù)線，軟件等，這種方法維修快。

排除法

縮小檢修范圍，準確判斷故障位置(如信號源部分、信號通道部分)。

邏輯檢修法

該方法要求對所修板件的信號流程、電源邏輯關系非常熟悉，可以確定維修的順序：是先從后級向前級檢修，還是單一通道向公共通道檢修等等。

滿足法

先大體確定故障部位后，再檢修部分電路的工作條件是否滿足(特殊情況下可人為制造工作條件)。

對比法

條件允許的情況下，可以對比好的板件進行檢修，也可以對比同一板件上相同的電路(對稱電路)來進行檢修。

先軟件后硬件

軟件涉及的故障范圍廣，但是需要檢修的范圍小，對于一些軟故障，建議先升級軟件。

初步檢修流程

維修口訣

液晶維修并不難，工作原理記心間；

電壓來自電源板，亮度來自背光源；

信號處理機芯板，顯示分配控制板；

5V供電最勤勞，一年四季歇不了；

12V供給機芯板，中放功放向它看；

24V送到背光板，無它屏幕缺光源；

機芯板子是領導，開關信號向它要；

電源模塊背光板，電平高開（機）低關；

PWM脈沖很重要，少了亮度提不高；

LVDS線要求高，變質松動有干擾；

液晶電視不普通，程序經(jīng)常鬧罷工；

三天兩天發(fā)神經(jīng)，需要復位來擺平；

液晶屏幕很脆弱，要維修時細（心）操作

平板維修費用高，學好技術很辛勞；

賺錢固然很重要，安全二字記心牢。

常見故障分析

顯示器整機無電

1、電源故障

這是一個應該說是非常簡單的故障，一般的液晶顯示器分機內電源和機外電源兩種，機外的常見一些。不論那種電源，易損的一般是一些小元件，象保險管、整流橋、300V濾波電容、電源開關管、電源管理IC、整流輸出二極管、濾波電容等。這些常用的芯片在專業(yè)液晶配件店里都能買到。

2、驅動板故障

驅動板燒保險或者是穩(wěn)壓芯片出現(xiàn)故障，有部分機器是把開關電源內置，輸出兩組電源，其中一組是5V，供信號處理用，另外一組是12V提供高壓板點背光用，如果開關電源部分電路出現(xiàn)了故障會有可能導致兩組電源均沒輸出先查12V電壓正常否，跟著查5V電壓正常否，因為A/D驅動板的MCU芯片的工作電壓是5V，所以查找開不了機的故障時，先用萬用表測量5V電壓，如果沒有5V電壓或者5V電壓變得很低，那么一種可能是電源電路輸入級出現(xiàn)了問題，也就是說12V轉換到5V的電源部分出了問題，這種故障很常見檢查5端穩(wěn)壓塊(常見型號8050SD-LM2596-AIC15-01等)。

另一種可能就是5V的負載加重了，把5V電壓拉得很低，換一種說法就是說，后級的信號處理電路出了問題，有部分電路損壞，引起負載加重，把5V電壓拉得很低，逐一排查后級出現(xiàn)問題的元件，替換掉出現(xiàn)故障的元件后，5V能恢復正常，故障一般就此解決，也經(jīng)常遇到5V電壓恢復正常后還不能正常開機的，這種情況也有多種原因，一方面是MCU的程序被沖掉可能會導致不開機。還有就是MCU本身損壞，比如說MCU的I/O口損壞，使MCU掃描不了按鍵，遇到這種由MCU引起的故障，找硬件的問題是沒有用的，就算你換了MCU也解決不了問題，因為MCU是需要編程和寫碼的，在沒辦法找到原廠的AD驅動板替換的情況下，我們只能用通用A/D驅動板代換如151D或161B等。

顯示屏黑屏，無背光，電源燈綠燈常亮

斜視液晶屏有顯示圖像，是因為MCU問題造成沒有輸出開關控制電壓，可以直接提取3端穩(wěn)壓塊的。

(AIC1084)3.3V代替，修理高壓板的思路(電源保險絲--開關控制管--電源管理IC--推挽發(fā)大管--電源開關管--DA轉換電路(儲能電感整流管)--LC升壓電路(升壓變壓器、升壓電容)--耦合電容--燈管。

屏幕亮線，亮帶或者是暗線

這種問題，一般是液晶屏的故障。

亮線故障一般是連接液晶屏本體的排線出了問題或者某行和列的驅動IC損壞

暗線一般是屏的本體有漏電，或者TAB柔性板連線開路以上兩種問題基本上就是給機器判了死刑了，沒有維修價值的，因為一塊屏的價格太高了。(廣州有專門更換碼片的，收費極高，返修率也高)。

花屏或者是白屏

這種問題一般是屏的驅動電壓出了問題，先換驅動板和驅屏線試驗，若不行檢查屏背板供電電路。

維修思路：驅動板5V轉3.3V的穩(wěn)壓塊(AIC1084)是否有供電輸出--屏體驅動板保險絲(F)-3.3V--DC轉換電路--負壓形成IC(-7V)--行列驅動IC。

AAT1101AM150XN05屏電源管理芯片，損壞后表現(xiàn)為白屏開機圖像暗淡等。

AAT1164M170EG01新款屏通病，主要用在明基FP71G+液晶顯示器上面。用一段時間會白屏、關機在開用一段時間又出現(xiàn)白屏。本芯片為液晶屏高壓產生及管理芯片、明基液晶顯示器常壞、故障為：白屏。

偏色故障

一般可以進入工廠調整模式進行調整。

維修思路：更換屏線和轉接板--重寫驅動程序--驅動板壞(不常見)--屏背板的控制IC壞(不常見)--拔掉屏線觀察背光顏色(背光偏色為燈管老化)--換燈管。

字符虛或拖尾

維修思路：檢查VGA信號線，重點看RGB三色線的地線是否連接正常--更換屏線或轉接板--重寫驅動程序--換驅動板--LCD屏背板信號接口 IC壞--LCD屏背板對比度電位器調整--LCD屏導光板錯位--偏光片錯位。

LCD屏幕內部有污點

維修思路：擦拭或更換換保護膜--拆開屏體清洗外層偏光片和有機玻璃(用棉球純凈水處理)--風筒吹干。

LCD屏漏光或光線不均

維修思路:重新安裝燈管--調整導光板。

LCD屏亮點

一個或二個大的亮點，可以嘗試輕輕用指尖壓亮點，可消失,說明多為此像素的開關管和電極虛連小的黑點和灰點有可能是內部導光板或偏光片有灰塵造成可清洗處理。

LCD屏亮度低

檢查高壓板ADJ亮度調節(jié)電路--換燈管--換高壓板---調整或更換導光板。

錯誤提示超出頻率范圍

檢查信號線--重寫MCU驅動程序--更換EPROM--重寫EPROM程序--換驅動板。

通電后不按開關按鍵即白屏，出現(xiàn)背光按鍵后圖像可正常顯示

高壓板接口的開關信號和ADJ信號反接造成部分屬于驅動板MCU的開關信號輸出不正常，可以重寫MCU程序修復--換MCU。

補充一點，對于燈管老化的屏更換時要搞清燈管的尺寸，因為盡管屏幕尺寸一樣，但是燈管長度與粗細略有差異，在找不到相同尺寸燈管的時候，如果能用短燈則好，如果不能使用，稍長的的燈管用手術刀小心切除屏框，并用熱縮管做好絕緣。

注意事項

電視機是有電高壓的一種電器，維修時有關的安全問題一定要注意。

1、打開機殼：要注意不能用蠻力打開機殼，如果太緊打不開，一定是還有螺釘或卡扣沒有松開，要再仔細找找；拉開機殼時有的電視機電路板與機殼之間會有電線相連，要注意不要拉壞，比較好先折下機殼上固定的電路板；拉開機殼時要拿穩(wěn)機殼，不要脫手掉下，否則容易砸到顯像管管徑，一旦砸斷可就麻煩了。

2、要注意電視機的“熱地”：有的電視機的電路板的地是“熱地”，就是與市電沒有隔離，如果恰巧電視機的電源插頭又將未隔離的電視機的“地”端插到市電的“火”線上，那么維修時如果你不小心碰到電視機的某個接“地”的部分，就有觸電的危險。一方面觸電本身很危險，另一方面人在觸電時身體會發(fā)生不由自主的痙攣，一旦把電視機拉到地上，就又出大麻煩了。解決這個問題比較好是用隔離變壓器，如果沒有，比較好在電視機通電時能調整好插頭方向，使電視機的“地”接到市電的“零”線上，這樣可以使電視機比較容易碰到的地方不“電”人，但是電視機里還是有與“火”線相連的強電的，仍然要小心。

3、要注意電視機內的高壓：在更換行輸出變壓器的時候，一定要用萬用表筆或其它導線將顯像管高壓帽下的高壓泄放干凈，否則在摘下高壓連線時會受到高壓電擊，同樣比較危險。

如何保養(yǎng)

1、保持干燥

放置的中央，環(huán)境要保持干燥并遠離化學藥品。假如放置環(huán)境濕度很大，電器內部就會結露，容易形成漏電、短路等。平常使用的發(fā)膠、滅蚊劑等都是高揮發(fā)性化學品，也會對液晶顯現(xiàn)屏形成損傷。

2、亮度調低

日常使用，盡量防止長時間顯現(xiàn)同一張畫面。長時間工作容易惹起內部老化或燒壞，特別糟糕的是長時間內顯現(xiàn)同一畫面，可能會招致某些像素過熱，形成內部產生壞點。而這種損壞不能修復。因而不用時應該關閉顯現(xiàn)屏或選擇屏幕保護程序，或者把顯現(xiàn)屏亮度調低點。

3、不能頻繁清洗

液晶顯現(xiàn)屏不能頻繁清洗。正確的清潔辦法是拿一塊沾有少許玻璃清潔劑的屏幕擦布，輕力把污跡擦去。注意不要讓清潔劑流到屏幕、屏框接口中，以免出現(xiàn)短路。也不要用硬質毛巾擦洗，以免刮花屏幕。還要定時定量擦洗。

4、制止壞習氣

杜絕使用壞習氣。不要用手對屏幕指指點點。此外變壓器電壓很高，不要在帶電的狀況下翻開屏的后蓋。

%3Chowto_content%3E[{"type":"paragraph","attrs":{"is_abstract":true},"children":[{"type":"text","text":"自從液晶電視上市以來，逐漸受到了人們的喜愛，很多人家里都安裝了液晶電視。和普遍的電視機相比，液晶電視比較省電、較為環(huán)保。但是對于電器來說，使用久了，出現(xiàn)故障也在所難免，那么該如何維修呢？","id":""}],"text":"","id":"WW8Ide2aGoiCgsxk5encV6gvnkh"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"基礎知識","id":""}],"text":"","id":"Zg4sdAmW0oa0Gsx50oLcYGQdnbR"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"組成結構","id":""}],"text":"","id":"Q2qyduGcyoGOuAxkbcycCbuBnlg"},{"type":"paragraph","children":[{"type":"text","text":"液晶電視機的組成原理，大體有4個主要功能模塊電源板，電視主板，邏輯板，背光模塊，以及屏線，遙控器，按鍵輸入和喇叭輸出。","id":""}],"text":"","id":"YqSOdSGksoKCkkxgjdpc8VC0nEd"},{"type":"image","attrs":{"height":547,"note":[{"type":"text","text":"組成結構","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/d49597eb3f2f458fb1aacdb8bcdbef9c","width":600},"text":"","id":"KIuGduc4Yo64sGxgDHGcyS0Hnog"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"電源板","id":""}],"text":"","id":"NCcadCGASoIKKaxI1gYcygzZnoc"},{"type":"image","attrs":{"height":382,"note":[{"type":"text","text":"電源板","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/33c208a51667444093165fd7f535bdad","width":640},"text":"","id":"N8OodMuAWo6Y0kxgTEac2Ntdnic"},{"type":"paragraph","children":[{"type":"text","text":"顧名思義，電源板負責整臺電視的供電。功能好比人的心臟，給人全身輸送能量。如果電源板壞了，就像人的心臟停止跳動，電視機自然就不能工作了。","id":""}],"text":"","id":"E2y2dAoKqo22aoxkhhmcxKcinxb"},{"type":"paragraph","children":[{"type":"text","text":"很多黑屏，背光不亮，指示燈不亮，遙控按鍵不起作用等現(xiàn)象都是因為電源板故障引起。","id":""}],"text":"","id":"K6S2dK66Uos0mCx6PqTc7rRPnIe"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"電視主板","id":""}],"text":"","id":"Om6gd4siSo44U6xyplZcfDDQnzX"},{"type":"paragraph","children":[{"type":"text","text":"電視主板是整個電視機控制的核心，也可以說是電視的大腦。","id":""}],"text":"","id":"HQWQd2WKgoEWIExa0EecUNIln8f"},{"type":"paragraph","children":[{"type":"text","text":"如果電視主板出現(xiàn)問題，可能導致指示燈不亮、或者指示燈顏色異常、遙控按鍵無響應、黑屏、花屏等現(xiàn)象。","id":""}],"text":"","id":"OyS4dCMsKoCkwSx8w6qcWrSFnCc"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"邏輯板","id":""}],"text":"","id":"BAA0dYS4ko8GaExOAlwcSMQzn3f"},{"type":"image","attrs":{"height":200,"note":[{"type":"text","text":"邏輯板","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/6a2ec3b6487a474bb0572cd6b41a6a41","width":476},"text":"","id":"ZgksdK60koWCCuxANPMcX2Ijnuf"},{"type":"paragraph","children":[{"type":"text","text":"","id":""}],"text":"","id":"GKWadUmOWoQK6cxQbUoclY8cn9f"},{"type":"paragraph","children":[{"type":"text","text":"邏輯板也稱TCON板，是信號中轉站。負責將主板的LVDS信號轉換成屏能處理的TCON信號。","id":""}],"text":"","id":"AQKCd4EUoooEGwxwV6EcWW8EnVg"},{"type":"paragraph","children":[{"type":"text","text":"如果TCON壞了，可能導致畫面黑屏，花屏，條紋干擾，屏閃，屏保等異常現(xiàn)象。","id":""}],"text":"","id":"Nwyud4k2moy8w0xMfDUcsxd2nYf"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"背光模塊","id":""}],"text":"","id":"W0iudm0eMosGogxEnR0cFf7unhh"},{"type":"image","attrs":{"height":376,"note":[{"type":"text","text":"背光模塊","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/f0a58b74bfb149388085b7d3c065f517","width":640},"text":"","id":"DkCCdyq0eoGMsWxGg10cl1h3nue"},{"type":"paragraph","children":[{"type":"text","text":"背光模塊的功能是給電視機顯示提供背光光源。","id":""}],"text":"","id":"XgqgdA6eSoamscxGkTEcrEuhn7e"},{"type":"paragraph","children":[{"type":"text","text":"如果電視背光不亮，很有可能是背光模塊出現(xiàn)了問題。","id":""}],"text":"","id":"FEMsdQsKaoEuyGxMx62cer6vn8d"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"LVDS信號線","id":""}],"text":"","id":"KesmdsScsoMkAaxUZkacXFfanwf"},{"type":"image","attrs":{"height":174,"note":[{"type":"text","text":"LVDS信號線","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/f2f5112c462f4d7689d15cca1b1d7274","width":288},"text":"","id":"IG2edW4gAoimeMx1qfDc7n8EnbS"},{"type":"paragraph","children":[{"type":"text","text":"","id":""}],"text":"","id":"QM0odQQqaoIgYkxmu1Nc6e2hn7g"},{"type":"paragraph","children":[{"type":"text","text":"屏線，又稱差分信號線。如果接口松動，接觸不良，很容易導致黑屏，雪花點干擾，花屏等異常現(xiàn)象。","id":""}],"text":"","id":"EcUMdCeuMoMgs8x2v7Nc6yronId"},{"type":"paragraph","children":[{"type":"text","text":"注意：4K電視，因為數(shù)據(jù)量大，LVDS信號線已無法滿足傳輸要求，一般都采用V-BY-ONE的信號線傳輸。","id":""}],"text":"","id":"HwyGdSIWkoKoiUx06WXcQbkUnOc"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"遙控接收頭","id":""}],"text":"","id":"D8OCduQagoGUkmxCK1hc1UlanHg"},{"type":"image","attrs":{"height":386,"note":[{"type":"text","text":"遙控接收頭","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/81b73b4097b34fa7bd7d91fc61b8ffbe","width":640},"text":"","id":"K2iYdKsC6oggeMxOInhcnIq1nCe"},{"type":"paragraph","children":[{"type":"text","text":"遙控接收頭，也稱IR，負責接收遙控器的紅外控制信號。如果按遙控器沒有反應，可能是遙控接收頭出現(xiàn)問題。","id":""}],"text":"","id":"EUckd0E8woqg2ixQZxYcNcumn3f"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"按鍵板","id":""}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[{"type":"text","text":"先大體確定故障部位后，再檢修部分電路的工作條件是否滿足(特殊情況下可人為制造工作條件)。","id":""}],"text":"","id":"V06YdMuwWoyaGQxszCvcTGGuncf"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"對比法","id":""}],"text":"","id":"CKw4d6Qgeo0gwoxkp5pcBtQBnGb"},{"type":"paragraph","children":[{"type":"text","text":"條件允許的情況下，可以對比好的板件進行檢修，也可以對比同一板件上相同的電路(對稱電路)來進行檢修。","id":""}],"text":"","id":"Ku4ydaGiooyQoGx6xBPcyrdvn3b"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"先軟件后硬件","id":""}],"text":"","id":"C6eOdwQu2okcSix6QYGcdHa5nnh"},{"type":"paragraph","children":[{"type":"text","text":"軟件涉及的故障范圍廣，但是需要檢修的范圍小，對于一些軟故障，建議先升級軟件。","id":""}],"text":"","id":"TWw4dMEiQoW2AkxSG5vcacnxnId"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"初步檢修流程","id":""}],"text":"","id":"OgYidI6KWoGk6Cx8gO4cu8cgnAc"},{"type":"image","attrs":{"height":696,"note":[{"type":"text","text":"初步檢修流程","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/0e2cbe3f472a42f688eec69e25fecdc6","width":1024},"text":"","id":"Za6kd8yo0oA68qxAZbXcgu39nZf"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"維修口訣","id":""}],"text":"","id":"QK2sdCQgiouQMIxUrDQccHbjnxe"},{"type":"paragraph","children":[{"type":"text","text":"液晶維修并不難，工作原理記心間；","id":""}],"text":"","id":"RMEcdw4qgoImGsxKwkLcLf4QnMb"},{"type":"paragraph","children":[{"type":"text","text":"電壓來自電源板，亮度來自背光源；","id":""}],"text":"","id":"SSkkduO8YoekY6xC8n3cwsoGnkd"},{"type":"paragraph","children":[{"type":"text","text":"信號處理機芯板，顯示分配控制板；","id":""}],"text":"","id":"OEAydai2UoqcQ8xktpWc0AyXnFe"},{"type":"paragraph","children":[{"type":"text","text":"5V供電最勤勞，一年四季歇不了；","id":""}],"text":"","id":"YuWadgeMYoSO8uxIN5icN7uInLd"},{"type":"paragraph","children":[{"type":"text","text":"12V供給機芯板，中放功放向它看；","id":""}],"text":"","id":"SoYAdy0S0oigGSxy0q0cSwYgnoh"},{"type":"paragraph","children":[{"type":"text","text":"24V送到背光板，無它屏幕缺光源；","id":""}],"text":"","id":"GEC8d0kKUoaqc6xmuFScMjUsnJh"},{"type":"paragraph","children":[{"type":"text","text":"機芯板子是領導，開關信號向它要；","id":""}],"text":"","id":"QgiudCKWuoA0ccxAtjjcJDSwnze"},{"type":"paragraph","children":[{"type":"text","text":"電源模塊背光板，電平高開（機）低關；","id":""}],"text":"","id":"PEe2d4SWooee2cxAddQchfRQn2d"},{"type":"paragraph","children":[{"type":"text","text":"PWM脈沖很重要，少了亮度提不高；","id":""}],"text":"","id":"FCkadcCw4oOca4xoLn3cSd9bnDd"},{"type":"paragraph","children":[{"type":"text","text":"LVDS線要求高，變質松動有干擾；","id":""}],"text":"","id":"QMgkdAEQko4k0oxaMh5citB7nWe"},{"type":"paragraph","children":[{"type":"text","text":"液晶電視不普通，程序經(jīng)常鬧罷工；","id":""}],"text":"","id":"KuOUdO4Ueo4WeCxWUNgcZnqjnCf"},{"type":"paragraph","children":[{"type":"text","text":"三天兩天發(fā)神經(jīng)，需要復位來擺平；","id":""}],"text":"","id":"IYKMdmk8Ao6McCxY9AKcveD1nOd"},{"type":"paragraph","children":[{"type":"text","text":"液晶屏幕很脆弱，要維修時細（心）操作","id":""}],"text":"","id":"N20edYIGSoeU0mxSLz2cZd8fnJx"},{"type":"paragraph","children":[{"type":"text","text":"平板維修費用高，學好技術很辛勞；","id":""}],"text":"","id":"SUc0dkSu2ocAQ2xSErXcV4MTnLa"},{"type":"paragraph","children":[{"type":"text","text":"賺錢固然很重要，安全二字記心牢。","id":""}],"text":"","id":"LcOidycYUoKeS6xq08bcrHRtnzh"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"常見故障分析","id":""}],"text":"","id":"GcQMduk84ooUUGxu8DwcxEA0nPc"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"顯示器整機無電","id":""}],"text":"","id":"C0Egds8a0oC0ikxC4HYcame9nKf"},{"type":"paragraph","children":[{"type":"text","text":"1、電源故障","id":""}],"text":"","id":"AWgsdo628oMIKaxs7lfcQigfnJg"},{"type":"paragraph","children":[{"type":"text","text":"這是一個應該說是非常簡單的故障，一般的液晶顯示器分機內電源和機外電源兩種，機外的常見一些。不論那種電源，易損的一般是一些小元件，象保險管、整流橋、300V濾波電容、電源開關管、電源管理IC、整流輸出二極管、濾波電容等。這些常用的芯片在專業(yè)液晶配件店里都能買到。","id":""}],"text":"","id":"Hg40di4uGoEwkAx0yGNcoySondc"},{"type":"image","attrs":{"height":644,"note":[{"type":"text","text":"顯示器整機無電","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/e171513b622b49df9723c2e41328c84e","width":597},"text":"","id":"RmKUdoes6oIUiYxUZqHcagDUnxh"},{"type":"paragraph","children":[{"type":"text","text":"","id":""}],"text":"","id":"YkAAdyaOsoyuwYxmpPpceRxinKq"},{"type":"paragraph","children":[{"type":"text","text":"2、驅動板故障","id":""}],"text":"","id":"IEUOd66KgoGoI8xIHemcXA1OnWe"},{"type":"paragraph","children":[{"type":"text","text":"驅動板燒保險或者是穩(wěn)壓芯片出現(xiàn)故障，有部分機器是把開關電源內置，輸出兩組電源，其中一組是5V，供信號處理用，另外一組是12V提供高壓板點背光用，如果開關電源部分電路出現(xiàn)了故障會有可能導致兩組電源均沒輸出先查12V電壓正常否，跟著查5V電壓正常否，因為A/D驅動板的MCU芯片的工作電壓是5V，所以查找開不了機的故障時，先用萬用表測量5V電壓，如果沒有5V電壓或者5V電壓變得很低，那么一種可能是電源電路輸入級出現(xiàn)了問題，也就是說12V轉換到5V的電源部分出了問題，這種故障很常見檢查5端穩(wěn)壓塊(常見型號8050SD-LM2596-AIC15-01等)。","id":""}],"text":"","id":"SWQIdq8q0oUiMUx0Emkc8b2VnNd"},{"type":"image","attrs":{"height":683,"note":[{"type":"text","text":"顯示器整機無電","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/f16f5f31cd6c494ab9713d7fab80f1aa","width":1024},"text":"","id":"AcO2d6u2KoGouYxm1uDcTyaHnGD"},{"type":"paragraph","children":[{"type":"text","text":"另一種可能就是5V的負載加重了，把5V電壓拉得很低，換一種說法就是說，后級的信號處理電路出了問題，有部分電路損壞，引起負載加重，把5V電壓拉得很低，逐一排查后級出現(xiàn)問題的元件，替換掉出現(xiàn)故障的元件后，5V能恢復正常，故障一般就此解決，也經(jīng)常遇到5V電壓恢復正常后還不能正常開機的，這種情況也有多種原因，一方面是MCU的程序被沖掉可能會導致不開機。還有就是MCU本身損壞，比如說MCU的I/O口損壞，使MCU掃描不了按鍵，遇到這種由MCU引起的故障，找硬件的問題是沒有用的，就算你換了MCU也解決不了問題，因為MCU是需要編程和寫碼的，在沒辦法找到原廠的AD驅動板替換的情況下，我們只能用通用A/D驅動板代換如151D或161B等。","id":""}],"text":"","id":"WEKKdMm82oO0AOxmijgcGJ82nCg"},{"type":"image","attrs":{"height":718,"note":[{"type":"text","text":"顯示器整機無電","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/6877eef394f0460391549cc7950ff2b9","width":1077},"text":"","id":"TemOdY8o8ooCscxC4v0cctYNnJe"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"顯示屏黑屏，無背光，電源燈綠燈常亮","id":""}],"text":"","id":"ScwmdYC2soiC0Uxy0AScaYgon7c"},{"type":"paragraph","children":[{"type":"text","text":"斜視液晶屏有顯示圖像，是因為MCU問題造成沒有輸出開關控制電壓，可以直接提取3端穩(wěn)壓塊的。","id":""}],"text":"","id":"DcCAd0sWyoUm0WxzWWcclrOVnIg"},{"type":"paragraph","children":[{"type":"text","text":"(AIC1084)3.3V代替，修理高壓板的思路(電源保險絲--開關控制管--電源管理IC--推挽發(fā)大管--電源開關管--DA轉換電路(儲能電感整流管)--LC升壓電路(升壓變壓器、升壓電容)--耦合電容--燈管。","id":""}],"text":"","id":"GUWGd8kEoo68ewx80Iqc5gxsntc"},{"type":"image","attrs":{"height":683,"note":[{"type":"text","text":"顯示屏黑屏，無背光，電源燈綠燈常亮","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/28d1d08e0d744012a98d93b2b825562d","width":1024},"text":"","id":"MsYyd8kKIoYUAsxWIPDcYNDFnKb"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"屏幕亮線，亮帶或者是暗線","id":""}],"text":"","id":"EOYgdaWOwoggwoxohgqc5uwvn5b"},{"type":"paragraph","children":[{"type":"text","text":"這種問題，一般是液晶屏的故障。","id":""}],"text":"","id":"J04udMScEogEgixag7UcHcR4nyh"},{"type":"paragraph","children":[{"type":"text","text":"亮線故障一般是連接液晶屏本體的排線出了問題或者某行和列的驅動IC損壞","id":""}],"text":"","id":"AcEAdaQkIoUY4OxY585cDxs6n4d"},{"type":"paragraph","children":[{"type":"text","text":"暗線一般是屏的本體有漏電，或者TAB柔性板連線開路以上兩種問題基本上就是給機器判了死刑了，沒有維修價值的，因為一塊屏的價格太高了。(廣州有專門更換碼片的，收費極高，返修率也高)。","id":""}],"text":"","id":"HWy8dsS2IoyCmqx2xcmc66POnFg"},{"type":"image","attrs":{"height":2000,"note":[{"type":"text","text":"屏幕亮線，亮帶或者是暗線","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/f8d9eb1e799a4641b7f7ba71179f73c8","width":3000},"text":"","id":"KY0Ad8EKooqioaxkZVwcJ31Unxf"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"花屏或者是白屏","id":""}],"text":"","id":"OA26d4yEeomOIAxOyyFc1I1anxg"},{"type":"paragraph","children":[{"type":"text","text":"這種問題一般是屏的驅動電壓出了問題，先換驅動板和驅屏線試驗，若不行檢查屏背板供電電路。","id":""}],"text":"","id":"JQiIdcoY0oyyKExqonxcIxPVnie"},{"type":"paragraph","children":[{"type":"text","text":"維修思路：驅動板5V轉3.3V的穩(wěn)壓塊(AIC1084)是否有供電輸出--屏體驅動板保險絲(F)-3.3V--DC轉換電路--負壓形成IC(-7V)--行列驅動IC。","id":""}],"text":"","id":"BwSgdaAkgoEwGuxQt1GcFIwRnde"},{"type":"paragraph","children":[{"type":"text","text":"AAT1101AM150XN05屏電源管理芯片，損壞后表現(xiàn)為白屏開機圖像暗淡等。","id":""}],"text":"","id":"W8YwdySA4ogUMCxWAF3chxuOnBd"},{"type":"paragraph","children":[{"type":"text","text":"AAT1164M170EG01新款屏通病，主要用在明基FP71G+液晶顯示器上面。用一段時間會白屏、關機在開用一段時間又出現(xiàn)白屏。本芯片為液晶屏高壓產生及管理芯片、明基液晶顯示器常壞、故障為：白屏。","id":""}],"text":"","id":"F6UcdsIaYoigw4xhXQYcSTbtnA4"},{"type":"image","attrs":{"height":720,"note":[{"type":"text","text":"花屏或者是白屏","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/0382d695e62249e48ce88ddd45e7eab2","width":1080},"text":"","id":"PECGdywYoouQEqxcjYVcjWO4nsg"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"偏色故障","id":""}],"text":"","id":"WUakdWow4oC0AYx8TxNcdEFKn2c"},{"type":"paragraph","children":[{"type":"text","text":"一般可以進入工廠調整模式進行調整。","id":""}],"text":"","id":"KAwwd8GmcoMgQoxJOl6cUuWingX"},{"type":"paragraph","children":[{"type":"text","text":"維修思路：更換屏線和轉接板--重寫驅動程序--驅動板壞(不常見)--屏背板的控制IC壞(不常見)--拔掉屏線觀察背光顏色(","id":""},{"type":"text","text":"背光偏色","id":""},{"type":"text","text":"為燈管老化)--換燈管。","id":""}],"text":"","id":"OE2EdwMqAo22G0x2hsKcJpSYnYf"},{"type":"image","attrs":{"height":595,"note":[{"type":"text","text":"偏色故障","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/682812f3a52745ab9015c2bdb8a8ffca","width":892},"text":"","id":"R2aAd6qASoCwSqx2DfncS7VlnFb"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"字符虛或拖尾","id":""}],"text":"","id":"QS0Ydw8IkomMO0xQDMicNxRVnid"},{"type":"paragraph","children":[{"type":"text","text":"維修思路：檢查VGA信號線，重點看RGB三色線的地線是否連接正常--更換屏線或轉接板--重寫驅動程序--換驅動板--LCD屏背板信號接口 IC壞--LCD屏背板對比度電位器調整--LCD屏導光板錯位--偏光片錯位。","id":""}],"text":"","id":"D0KUdse84ouMuQxGGovcCqUWnHf"},{"type":"image","attrs":{"height":683,"note":[{"type":"text","text":"字符虛或拖尾","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/49e51c98340e47e8b7bfb8076eb3684a","width":1024},"text":"","id":"Dyu2dmkEsoSiimxyOIScRdQ8nHh"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"LCD屏幕內部有污點","id":""}],"text":"","id":"WIyKdkuCuoI2MqxSkyZcRKEcnMg"},{"type":"paragraph","children":[{"type":"text","text":"維修思路：擦拭或更換換保護膜--拆開屏體清洗外層偏光片和有機玻璃(用棉球純凈水處理)--風筒吹干。","id":""}],"text":"","id":"Ygi2dkiY4oO6sExAXsycPzo6nSc"},{"type":"image","attrs":{"height":746,"note":[{"type":"text","text":"LCD屏幕內部有污點","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/3411022d6b21474aa77b1f139bcb0fcf","width":1119},"text":"","id":"EAUGdQi4yoaaY4xEFqIcBxQrnKd"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"LCD屏漏光或光線不均","id":""}],"text":"","id":"O4KWdaCcio8gqGxuGtWcl6ktnVc"},{"type":"paragraph","children":[{"type":"text","text":"維修思路:重新安裝燈管--調整導光板。","id":""}],"text":"","id":"EgYMdOAgOosEU8xu8BJclmLjnqg"},{"type":"image","attrs":{"height":575,"note":[{"type":"text","text":"LCD屏漏光或光線不均","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/4f1fae90dd7f4885875a98b12d344c37","width":862},"text":"","id":"KaA2dmCEQocMuwxaEhlcgUhwnKd"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"LCD屏亮點","id":""}],"text":"","id":"RQE0dwIycoAK2ax2hmVc4DIWn2c"},{"type":"paragraph","children":[{"type":"text","text":"一個或二個大的亮點，可以嘗試輕輕用指尖壓亮點，可消失,說明多為此像素的開關管和電極虛連小的黑點和灰點有可能是內部導光板或偏光片有灰塵造成可清洗處理。","id":""}],"text":"","id":"BCQUdoykSoGQcAxh5gQcr7XenxI"},{"type":"image","attrs":{"height":720,"note":[{"type":"text","text":"LCD屏亮點","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/39e02217bd5d47d88ba8642545866e1b","width":1080},"text":"","id":"CEgKd8sgWosqEmxG8gBcswkynme"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"LCD屏亮度低","id":""}],"text":"","id":"GOQmdYWuioG6KExmKzJcaD6anVh"},{"type":"paragraph","children":[{"type":"text","text":"檢查高壓板ADJ亮度調節(jié)電路--換燈管--換高壓板---調整或更換導光板。","id":""}],"text":"","id":"PIgCdkW6eoKeEAxA1K6cYRjknzh"},{"type":"image","attrs":{"height":720,"note":[{"type":"text","text":"LCD屏亮度低","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/d2f309cae5554291ad52f0a37e78fa36","width":1080},"text":"","id":"PMYMdWGmqoKiQMxUzJ5cZG7bnBf"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"錯誤提示超出頻率范圍","id":""}],"text":"","id":"UKkGdaY0UoYoeKx0AVLcATRRnTb"},{"type":"paragraph","children":[{"type":"text","text":"檢查信號線--重寫MCU驅動程序--更換EPROM--重寫EPROM程序--換驅動板。","id":""}],"text":"","id":"MAEMd8Mywom02Ox6f52cPjNondb"},{"type":"image","attrs":{"height":683,"note":[{"type":"text","text":"錯誤提示超出頻率范圍","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/ddcfcfe2eef44b059d28fdf4aff6f628","width":1024},"text":"","id":"QoYidAMsMo2gk4xye2Bchj7nn0f"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"通電后不按開關按鍵即白屏，出現(xiàn)背光按鍵后圖像可正常顯示","id":""}],"text":"","id":"OqYsdU2e6oCMuuxGCkRcnqnpnne"},{"type":"paragraph","children":[{"type":"text","text":"高壓板接口的開關信號和ADJ信號反接造成部分屬于驅動板MCU的開關信號輸出不正常，可以重寫MCU程序修復--換MCU。","id":""}],"text":"","id":"UOw0dACO4oKkYIxeQAFcx3sfnVf"},{"type":"paragraph","children":[{"type":"text","text":"補充一點，對于燈管老化的屏更換時要搞清燈管的尺寸，因為盡管屏幕尺寸一樣，但是燈管長度與粗細略有差異，在找不到相同尺寸燈管的時候，如果能用短燈則好，如果不能使用，稍長的的燈管用手術刀小心切除屏框，并用熱縮管做好絕緣。","id":""}],"text":"","id":"UyU8dEUCaoUWygxc98xcWNPknee"},{"type":"image","attrs":{"height":483,"note":[{"type":"text","text":"通電后不按開關按鍵即白屏，出現(xiàn)背光按鍵后圖像可正常顯示","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/e69eef55771b48e7bbf6ebcdc5b0165c","width":725},"text":"","id":"FkEQdQikyouEcMx2xS3chyPon8d"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"注意事項","id":""}],"text":"","id":"GAsmd4agGouIk2x43LCc4WoTnRg"},{"type":"paragraph","children":[{"type":"text","text":"電視機是有電高壓的一種電器，維修時有關的安全問題一定要注意。","id":""}],"text":"","id":"YCaIdiMsSogi28xUdokcdns6nng"},{"type":"paragraph","children":[{"type":"text","text":"1、打開機殼：要注意不能用蠻力打開機殼，如果太緊打不開，一定是還有螺釘或卡扣沒有松開，要再仔細找找；拉開機殼時有的電視機電路板與機殼之間會有電線相連，要注意不要拉壞，比較好先折下機殼上固定的電路板；拉開機殼時要拿穩(wěn)機殼，不要脫手掉下，否則容易砸到顯像管管徑，一旦砸斷可就麻煩了。","id":""}],"text":"","id":"RG2KdeSkco0eAKxIN1TcdXBFneg"},{"type":"image","attrs":{"height":888,"note":[{"type":"text","text":"注意事項","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/3541dbd8ad7a44cab04154722ed2ea1b","width":1332},"text":"","id":"HcUGdoY4GoEOYxxSOaVcjAjbnio"},{"type":"paragraph","children":[{"type":"text","text":"2、要注意電視機的“熱地”：有的電視機的電路板的地是“熱地”，就是與市電沒有隔離，如果恰巧電視機的電源插頭又將未隔離的電視機的“地”端插到市電的“火”線上，那么維修時如果你不小心碰到電視機的某個接“地”的部分，就有觸電的危險。一方面觸電本身很危險，另一方面人在觸電時身體會發(fā)生不由自主的痙攣，一旦把電視機拉到地上，就又出大麻煩了。解決這個問題比較好是用隔離變壓器，如果沒有，比較好在電視機通電時能調整好插頭方向，使電視機的“地”接到市電的“零”線上，這樣可以使電視機比較容易碰到的地方不“電”人，但是電視機里還是有與“火”線相連的強電的，仍然要小心。","id":""}],"text":"","id":"YEMOdOAAwom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2. 佳能單反換主板

打印機啟動時沒有反應，或者無法啟動系統(tǒng)，或者直接開不了機。

這種情況主板問題占絕大多數(shù)，可測主板主芯片的兩個電源對地測量值是否正常、過流保險是否損壞、電機驅動及電源芯片是否損壞。同時打印頭也未必是好的，可以對打印頭進行快速檢測。

2、無法通電，插電不顯示運轉。

檢查插線沒有故障后，就可以鎖定是主板的原因了。主板內部出了很大的故障才會有這種情況。

3、開機后自動關機。

開機后自檢或使用過程中關機，隨后或隔一段時間可以再開機。這種情況可以先檢測打印頭排除打印頭損壞因素，然后可以更換電源插座或電源線排除電力連接不穩(wěn)定的因素。

4、打印速度變慢、走走停停、間歇打印、雙閃6次或8次

3. 單反相機換主板多少錢

單反相機的鏡頭如果被摔一下的話，要看損壞的程度。如果只是輕微的劃痕不影響使用的話，是不用維修的。如果鏡頭損傷可以去維修商，那你去換個鏡片即可。如果是主板損傷，那么就要更換主板，價格較貴一些。如果維修的價格已經(jīng)和鏡頭本身的價格相似的話，還是建議換個新鏡頭。

4. 相機更換主板

1、電池沒電了，給電池充電或換一塊電池試試。

2、電池槽觸點故障，電池槽內的觸點因電池漏液或者機器浸液出現(xiàn)氧化，與電池不能連接，會導致無法開機，檢查方法是，給相機安裝有電的電池，仍然無法開機，打開電池槽可以看到電池觸點有黃綠色的銹跡，說明電池槽觸點故障。 解決方法是去售后維修站更換維修或者更換卡槽觸點。

3、相機是否進水或摔過，導致內部配件損壞。這個要找售后廠家維修。

4、電源開關或者主板故障，相機電源開關或者機器主板故障也會導致相機無法開機。解決方法是去售后維修站檢測維修。

5. 佳能打印機換主板教程

挺貴的

噴墨打印機主板壞了就劃不來修了 佳能速度快愛普生色彩好 如果注重顏色建議換愛普生吧 修主板一般都兩三五百不等 而且佳能墨盒墨容量少還容易堵塞 經(jīng)常出問題。

6. 佳能1dx快門更換

一般來說，快門鍵是沒有圖標的。

所以，需要看看單反的上方哪個按鈕沒有圖標，而且按鈕的面積大一些，基本就是它了。大部分的快門鍵都位于相機使用時候的右手食指附近，通常都是圓形的按鈕。比如佳能單反的快門鍵在右側的上方，相對其他按鈕來說，比較大的那個就是快門鍵。

7. 佳能相機1d系列換主板教程圖解

謝謝邀請。這是主板自檢循環(huán)的原因，電腦每次開機主板都要自檢一次，看是否所有部件都待命完畢，才會開始進入硬盤引導，然后進系統(tǒng)。

如果自檢過不了，或者不停的在某個地方循環(huán)，從而從新自檢，屏幕也無法點亮。

解決方法：可以上診斷卡，查看主板跑碼，到底問題出現(xiàn)在什么地方，再進一步針對性的解決。

如果沒有診斷卡：把內存換到另一個插槽、BIOS重置、壓橋、清塵。

運氣好的話，或許可以解決。

運氣不好的話，只能上診斷卡、萬用表等。----------------------分割------------------可以導致這個故障的原因非常之多，因為任何一個環(huán)節(jié)不正常，都可以導致主板自檢過不了，或一直循環(huán)著。

但是你的只是時間問題，就會能過自檢。

由此判斷可能性極高是：內存、CPU、橋、晶振。

8. 佳能相機1d系列換主板教程視頻

這是主板自檢循環(huán)的原因，電腦每次開機主板都要自檢一次，看是否所有部件都待命完畢，才會開始進入硬盤引導，然后進系統(tǒng)。

如果自檢過不了，或者不停的在某個地方循環(huán)，從而從新自檢，屏幕也無法點亮。

解決方法：可以上診斷卡，查看主板跑碼，到底問題出現(xiàn)在什么地方，再進一步針對性的解決。

如果沒有診斷卡：把內存換到另一個插槽、BIOS重置、壓橋、清塵。

運氣好的話，或許可以解決。

運氣不好的話，只能上診斷卡、萬用表等。----------------------分割------------------可以導致這個故障的原因非常之多，因為任何一個環(huán)節(jié)不正常，都可以導致主板自檢過不了，或一直循環(huán)著。

但是你的只是時間問題，就會能過自檢。

由此判斷可能性極高是：內存、CPU、橋、晶振。