Lenovo ThinkPad W541 (English) Hardware Maintenance Manual - ThinkPad T540p, W - Page 44

Table 2. Numeric error codes (continued) Symptom or error 2200 Machine Type and Serial Number are invalid. 2201 Machine UUID is invalid FRU or action, in sequence Replace the system board. Replace the system board. Error messages Table 3. Error messages Symptom or error Fan error. Thermal sensing error. The battery installed is not supported by this system and will not charge. Please replace the battery with the correct Lenovo battery for this system. Press the ESC key to continue. This system does not support batteries that are not genuine Lenovo made or authorized. The system will continue to boot, but may not charge unauthorized batteries. Press the ESC key to continue. Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. FRU or action, in sequence 1. Replace the fan. 2. Apply thermal grease. 3. Replace the system board. Replace the system board. Replace the battery. Replace the battery. Beep symptoms Table 4. Beep symptoms Symptom or error Four cycles of four short beeps One short beep, pause, three short beeps, pause, three more short beeps, pause, and one short beep Five short beeps Three short beeps, pause, one short beep, pause, one more short beep, pause, and three short beeps One long and two short beeps FRU or action, in sequence Replace the system board. 1. Replace the memory module. 2. Replace the system board. Replace the system board. Remove the device from ExpressCard slot. Replace the system board. 38 Hardware Maintenance Manual