Power-Related Symptoms
Symptom/Error FRU/Action in Sequence
Power shuts down
during operation. 1. Battery
2. AC Adapter
3. DC/DC & Charger board
4. System board
The system will not
power on. 1. Battery
2. AC Adapter
3. DC/DC & Charger board
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
3. System board
Battery can't be
charged. Battery
DC/DC & Charger board
Combobayboard
Systemboard
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. Check if hibernation file is
created.
2. Keyboard (if control is from
the keyboard)
3. Hard disk drive
4. System board

ThinkPad 390X / i 1700 HMM 43