Lenovo NetVista A22 Hardware Maintenance Manual (HMM) for NetVista 2254, 2256, - Page 114
V NiCad Main Battery Pack, External Power Control not connected
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POST Error Code 27512 27535 27554 27555, 27556 27557 27558, 27559, 27560, 27561 27562 27563, 27564 275XX 27801 to 27879 27880 to 27889 999030X Hard disk reset failure FRU/Action 1. WMSELF.DGS diagnostics file is missing 2. WMSELF.DGS diagnostics file is incorrect 1. 3V Lithium Backup Battery 2. ServerGuard Adapter 1. Internal Temperature out of range 2. ServerGuard Adapter 1. ServerGuard Adapter 2. Power Supply 1. 7.2V NiCad Main Battery Pack 2. ServerGuard Adapter 1. PCMCIA Type II Modem 2. ServerGuard Adapter 1. External Power Control not connected 2. External Power Control 3. ServerGuard Adapter 1. External Power Control 2. ServerGuard Adapter 1. Update Diagnostic Software 1. Personal Dictation System 2. Adapter 3. System Board 1. External FRU (Speaker, Microphone) 1. Possible hard disk drive problem; see "Hard disk drive boot error" on page 70. 106 Hardware Maintenance Manual