Lenovo ThinkPad X121e Hardware Maintenance Manual - Page 45
Error messages, Beep symptoms, Table 3. Error messages, Table 4. Beep symptoms - fan error
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Error messages Table 3. Error messages Symptom or error (beeps, if any) Fan error. Thermal sensing error. This system does not support batteries that are not genuine Lenovo-made or authorized. This system will continue to boot, but may not charge unauthorized batteries. 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. Fan. 2. Thermal grease. 3. System board. System board. Replace the battery. Beep symptoms Table 4. Beep symptoms Symptom or error FRU or action, in sequence One beep and a blank, unreadable, or flashing LCD. 1. Reseat the LCD connector. 2. LCD assembly. 3. External CRT. 4. System board. One long and two short beeps, and a blank or unreadable LCD. 1. System board. 2. LCD assembly. 3. DIMM. Two short beeps with error codes. POST error. See "Numeric error codes" on page 38. Two short beeps and a blank screen. 1. System board. 2. DIMM. Three short beeps, pause, three more short beeps, and one short beep. 1. DIMM. 2. System board. One short beep, pause, three short beeps, pause, three more short beeps, and one short beep. Only the cursor appears. Reinstall the operating system. Four cycles of four short beeps and a blank screen. System board (security chip) Five short beeps and a blank screen. System board No-beep symptoms Table 5. No-beep symptoms Symptom or error No beep, power-on indicator on, LCD blank, and no POST. No beep, power-on indicator on, and LCD blank during POST. FRU or action, in sequence 1. Make sure that every connector is connected tightly and correctly. 2. DIMM. 3. System board. 1. Reseat DIMM. 2. System board. Chapter 4. Related service information 39