Lenovo ThinkPad 760E ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADoc - Page 157
LCD-Related Symptoms, Keyboard or TrackPoint III Related Symptoms, of missing, discolored
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Symptom / Error No beep during POST but system runs correctly. FRU / Action in Sequence 1. Turn the volume up and check the speaker. 2. Speaker 3. System board LCD-Related Symptoms Important The LCD for the notebook computer contains 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, 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 21 or more. Symptom / Error No beep, power-on indicator on, and a blank LCD during POST. LCD backlight not working, or LCD too dark, or LCD brightness cannot be adjusted, or LCD contrast cannot be adjusted. LCD screen unreadable, or Characters missing pels, or Screen abnormal, or Wrong color displayed. LCD has extra horizontal or vertical lines displayed. FRU / Action in Sequence DC/DC card System board 1. Reseat the LCD connectors. 2. LCD assembly 3. System board 1. See important note for "LCD-Related Symptoms." 2. Reseat all LCD connectors. 3. LCD assembly 4. System board LCD assembly Keyboard or TrackPoint III Related Symptoms Symptom / Error FRU / Action in Sequence Keyboard (one or more keys) does not work. 1. Reseat the keyboard cable on the system board. 2. Keyboard 3. System board ThinkPad 560, 560E (2640) 145
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