Lenovo ThinkPad 11e Hardware Maintenance Manual - Page 43

Error messages Table 2. Error messages Symptom or error Fan error Thermal sensing error FRU or action, in sequence 1. Fan 2. Thermal grease 3. System board System board Beep symptoms Table 3. Beep symptoms Symptom or error One short beep, pause, three short beeps, pause, three more short beeps, pause, and one short beep One long and two short beeps Four cycles of four short beeps Five short beeps FRU or action, in sequence System board System board System board System board No-beep symptoms Table 4. No-beep symptoms Symptom or error No beep, system-status indicator on, LCD blank, and no POST. No beep, system-status indicator on, and LCD blank during POST. The power-on password prompt appears. The hard-disk password prompt appears. FRU or action, in sequence 1. Ensure that every connector is connected tightly and correctly. 2. System board System board A power-on password or a supervisor password is set. Type the password and press Enter. A hard-disk password is set. Type the password and press Enter. LCD-related symptoms Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The presence of 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.If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced. Notes: • This policy applies to all ThinkPad notebooks purchased on 1 January, 2008 or later. • Lenovo will not provide replacement if the LCD is within specification as we cannot guarantee that any replacement LCD will have zero pixel defects. • One pixel consists of R, G, B sub-pixels. Chapter 4. Related service information 37