IBM 2621421 Hardware Maintenance Manual - Page 136
Indicator-Related Symptoms, Power-Related Symptoms, Memory-Related Symptoms
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Indicator-Related Symptoms Symptom/Error FRU/Action in Sequence Indicator incorrectly remains off or on, but system runs correctly. Reconnect the indicator board connector. Indicator board Power-Related Symptoms Symptom/Error Power shuts down during operation. The system doesn't power on. The system doesn't power off. Battery can't be charged. FRU/Action in Sequence Go to "Power Systems Check" on page 111. AC Adapter Battery pack Audio PCB DC/DC charger System board Go to "Power Systems Check" on page 111. AC Adapter DC/DC charger System board Go to "Power Systems Check" on page 111. Hold and press the power switch for more than 4 seconds. DC/DC charger System board Go to "Power Systems Check" on page 111. Battery pack DC/DC charger System board Memory-Related Symptoms Symptom/Error FRU/Action in Sequence Memory count (size) appears different from the actual size. Go to "Memory Check" on page 113. Enter BIOS Utility and execute "Load Setup Default Settings"; then reboot the system. DIMM System board 128 ThinkPad i Series 1400 HMM