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Symptom/Error FRU/Action in Sequence
The system will not
power on.
1. Battery ASM
2. AC Adapter
3. DC/DC & Charger board ASM
4. System board
The system will not
power off.
1. Press and hold the power
switch for more than 4
seconds
2. DC/DC & Charger board ASM
3. System board
Battery can't be
charged.
Battery
DC/DC & Charger board ASM
Combobay board
System board
PC Card (PCMCIA)-Related Symptoms
Symptom/Error FRU/Action in Sequence
System cannot detect
the PC Card
(PCMCIA)
1. PC Card (PCMCIA) slots
assembly
2. System board
Speaker-Related Symptoms
Symptom/Error FRU/Action in Sequence
Speakers make noise
or no sound comes
from system.
1. Speaker
2. System board
In DOS or Windows
multimedia programs,
no sound comes from
the computer.
1. Speaker
2. System board
Power Management-Related Symptoms
Symptom/Error FRU/Action in Sequence
The system will not
enter hibernation
mode.
1. Keyboard (if control is from
the keyboard)
2. Hard disk drive
3. System board
The system will not
wake up from
hibernation mode.
1. Keyboard (if control is from
the keyboard)
2. Hard disk drive
3. System board
The system will not
enter suspend mode
after closing the LCD.
1. Lid switch
2. System board
ThinkPad 390E 45