Lenovo ThinkPad 390 ThinkPad 390 / i Series 1720 models Hardware Maintenance M - Page 46

Keyboard-Related Symptoms, Indicator-Related Symptoms, Power-Related Symptoms, PC Card (PCMCIA)-

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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 correctly. 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 System cannot detect the PC Card (PCMCIA) FRU/Action in Sequence 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

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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