Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 124

LCD-Related Symptoms Important The TFT LCD on some models of this computer contains over 1,440,000 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 dots satisfies the following condition: 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 1. System Board 2. CPU Card 1. Reseat the LCD connectors. 2. LCD Assembly 1. See important note for "LCD-Related Symptoms." 2. Reseat all LCD connectors. 3. LCD Assembly 4. System Board LCD Assembly 112 IBM Mobile Systems - ThinkPad HMM Volume 3