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Keyboard-Related Symptoms
Symptom/Error FRU/Action in Sequence
Keyboard (one or
more keys) doesn't
work.
1. Reseat the keyboard cable.
2. Keyboard
3. Planar board
Indicator-Related Symptoms
Symptom/Error FRU/Action in Sequence
Indicator incorrectly
remains off or on, but
system runs cor-
rectly.
1. Reseat the LED board.
2. LED board
3. Planar board
Power-Related Symptoms
Symptom/Error FRU/Action in Sequence
Power shuts down
during operation.
1. Battery
2. AC Adapter
3. DC/DC & Charger board ASM
4. Planar board
The system will not
power on.
1. Battery ASM
2. AC Adapter
3. DC/DC & Charger board ASM
4. Planar board
The system will not
power off.
1. DC/DC & Charger board ASM
2. Planar board
Battery can't be
charged.
Battery
DC/DC & Charger board ASM
Combobay board
Planar 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. Planar board
Speaker-Related Symptoms
Symptom/Error FRU/Action in Sequence
Speakers make noise
or no sound comes
from system.
1. Speaker
2. Planar board
In DOS or Windows
multimedia programs,
no sound comes from
the computer.
1. Speaker
2. Planar board
38 ThinkPad 390/i Series 1700