Lenovo ThinkPad A22p ThinkPad A2* Series Hardware Maintenance Manual (October - Page 58
Error messages
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Error messages Symptom or error Device address conflict. Allocation error for device. Failing bits: nnnn. Invalid system configuration data. I/O device IRQ conflict. Operating system not found. Hibernation error. Fan error. Symptom-to-FRU index FRU or action, in sequence 1. Load Setup Defaults in IBM BIOS Setup Utility. 2. Backup battery. 3. System board. 1. Load Setup Defaults in IBM BIOS Setup Utility. 2. Backup battery. 3. System board. 1. DIMM. 2. System board. 1. DIMM. 2. System board. 1. Load Setup Defaults in IBM BIOS Setup Utility. 2. Backup battery. 3. System board. 1. Check that the operating system has no failure and is installed correctly. 2. Enter IBM BIOS Setup Utility and see whether the hard-disk drive and the diskette drive are properly identified. 3. Reseat the hard-disk drive. 4. Reinstall the operating system. 5. Diskette drive. 6. Hard-disk drive. 7. System board. 1. Restore the system configuration to what it was before the computer entered hibernation mode. 2. If memory size has been changed, re-create the hibernation file. Fan. 52 ThinkPad A20m/p, A21m/p, A22m/p