Lenovo ThinkPad i Series 1300 ThinkPad 130, 1200, 1300 - Hardware Maintenance - Page 52

LCD-Related Symptoms LCD FRU Replacement Notice The TFT LCD for the computer contains many thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots is a 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 SVGA : 5 or more bright dots, 5 or more dark dots, or a total of 9 or more bright and dark dots. v XGA : 8 or more bright dots, 8 or more dark dots, or a total of 9 or more bright and dark dots. Symptom/Error LCD backlight does not work. LCD is too dark. LCD brightness cannot be adjusted. LCD contrast cannot be adjusted (HPA LCD models only). Unreadable LCD screen. Missing pixels in characters. Abnormal screen Wrong color displayed. LCD has extra horizontal or vertical lines displayed. FRU/Action in Sequence v Keyboard (if contrast and brightness function keys do not work) v Reseat LCD connector v Check LCD inverter ID v LCD Cable ASM v LCD Inverter board (12.1″); LCD Inverter/LED board (13.0″/13.3″) v LCD v System board v Reseat LCD connector v Check LCD inverter ID v LCD Cable ASM v LCD Inverter board (12.1″); LCD Inverter/LED board (13.0″/13.3″) v LCD v System board v Check LCD inverter ID v LCD Cable ASM v LCD Inverter board (12.1″); LCD Inverter/LED board (13.0″/13.3″) v LCD v System board 42 ThinkPad i Series 1200/1300 HMM