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. Planarboard
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. LEDboard
3. Planarboard
Power-Related Symptoms
Symptom/Error FRU/Action in Sequence
Power shuts down
during operation. 1. Battery
2. ACAdapter
3. DC/DC & Charger board ASM
4. Planarboard
The system will not
power on. 1. BatteryASM
2. ACAdapter
3. DC/DC & Charger board ASM
4. Planarboard
The system will not
power off. 1. DC/DC & Charger board ASM
2. Planarboard
Battery can't be
charged. Battery
DC/DC & Charger board ASM
Combobayboard
Planarboard
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. Planarboard
Speaker-Related Symptoms
Symptom/Error FRU/Action in Sequence
Speakers make noise
or no sound comes
from system.
1. Speaker
2. Planarboard
In DOS or Windows
multimedia programs,
no sound comes from
the computer.
1. Speaker
2. Planarboard
38 ThinkPad 390/i Series 1700