LCD Related Symptoms (2625)

LCD Related Symptoms
  The TFT LCD of the notebook computers contain over 921.000 thin film transistors (TFTs). A small number of missing, discolored or lighted dots (on all the time) is characteristic of TFT LCD technology. Excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing or discolored, or lighted dots in any colored background is 21 or more.
Symptom/Error    FRU/Action
   ° LCD backlight not working, or 1. Reseat the LCD connectors.
   LCD too dark, or 2. Inverter Card
   ° LCD brightness cannot be adjusted, 3. LCD Assembly
   or LCD contrast cannot be adjusted. 4. Keyboard Card
  5. DC/DC Card
   ° LCD screen unreadable, or 1. See the preceding important note.
   Characters missing pels, or 2. Reseat all LCD connectors.
   ° Screen abnormal, or 3. LCD Assembly
   Wrong color displayed. 4. System Board
  5. Keyboard Card
   LCD has extra horizontal 1. LCD Assembly
   or vertical lines displayed.  
   No beep, power-on indicator on, 1. System Board
   and a blank LCD during POST. 2. DC/DC Card
  3. Processor Card

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