常见问题 LCD相关问题 X30_2672

. 2016-01-07 02:52:30 | 知识编号: 021236

LCD-related symptoms













Important _________________________________  The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). A small number of dots that are missing discolored or always lighted is characteristic of TFT LCD technology but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing discolored or lighted dots in any background is:



v XGA: 8 or more bright dots 8 or more dark dots or a total of 9 or more bright and dark dots.



Note: A bright dot means a pixel is always on (white or color.) A dark dot means a pixel is always off (black color.)



 









































Symptom or error



FRU or action in sequence



No beep power-on indicator



on and a blank LCD during



POST.



System board.



v



v



v



v



LCD backlight not working.



LCD too dark.



LCD brightness cannot be



adjusted.



LCD contrast cannot be



adjusted.



1.



2.



3.



Reseat the LCD



connectors.



LCD assembly.



System board.



v



v



v



v



LCD screen unreadable.



Characters missing pixels.



Screen abnormal.



Wrong color displayed.



1.



2.



3.



4.



See important note for



LCD-related symptoms.



Reseat all LCD connectors.



LCD assembly.



System board.



 



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