IBM 2621421 Hardware Maintenance Manual - Page 137
Symptom/Error, FRU/Action in Sequence, Fn+F12
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Audio-Related Symptoms Symptom/Error FRU/Action in Sequence Internal speakers make noise or emit no sound. Speaker volume control Go to "Audio Function Check" on page 115. External speakers make noise or emit no sound. Speaker volume control Go to "Audio Function Check" on page 115. In DOS or Windows, multimedia programs, no sound comes from the computer. (Only system beeps are heard at power on.) Speaker volume control Go to "Audio Function Check" on page 115. PC Card (PCMCIA)-Related Symptoms Symptom/Error FRU/Action in Sequence System cannot detect the PC Card (PCMCIA) PC Card (PCMCIA) slots assembly System board PCMCIA slot pin is damaged. PC Card (PCMCIA) slots assembly Power Management-Related Symptoms Symptom/Error FRU/Action in Sequence The system doesn't enter hibernation mode and four short beeps every minute are heard. Go to "Hibernation Mode" on page 121. Boot an operating system and press Fn+F12 to see if the computer enters hibernation mode. TrackPoint board Keyboard Hard disk connection board Hard disk drive System board The system doesn't resume from hibernation mode. Go to "Hibernation Mode" on page 121. Hard disk connection board Hard disk drive System board The system doesn't enter standby mode after closing the LCD. Chassis (LCD cover switch on chassis) System board The system doesn't resume from standby mode after opening the LCD. Chassis (LCD cover switch on chassis) System board ThinkPad i Series 1400 (Part II) 129