Symptom/Error

 

 

 

 

 

FRU/Action

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LCD

screen

unreadable

or

1. See

important

note

 

 

 

characters

 

missing

pels.

 

for “LCD FRU

 

 

 

 

 

 

 

 

 

 

 

 

Replacement

Notice”

 

 

 

 

 

 

 

 

 

 

 

 

on

page 124.

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

LCD Assembly

 

 

 

 

 

 

 

 

 

 

 

 

3.

System Board

 

 

 

 

 

 

 

 

 

 

 

 

LCD too dark, unable to

 

1.LCD

 

 

 

 

 

 

adjust

contrast

or

 

 

2.

Video Card

 

 

 

brightness.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LCD

slightly

 

dims

when

 

1.Normal

operation

 

 

 

 

changing

to

 

battery power. (Dimming of LCD

 

 

 

 

 

 

 

 

 

 

 

 

conserves

battery

 

 

 

 

 

 

 

 

 

 

 

power.)

 

 

 

 

 

 

 

 

 

 

 

 

LCD unreadable, illegible, or1.LCD

 

 

 

 

 

 

distorted.

 

 

 

 

 

 

2.

Video Card

 

 

 

 

 

 

 

 

 

 

 

 

3.

System Board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LCD

cannot

be

powered-on

1.Video

Card

 

 

 

 

 

or

off.

 

 

 

 

 

 

2.

System Board

 

 

 

 

 

 

 

 

 

 

 

 

3.

Voltage Converter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blank

screen,

 

or

extra

 

1.LCD

 

 

 

 

 

 

horizontal or vertical lines2.

Video Card

 

 

 

displayed on upper or lower3.

System Board

 

 

 

half of the LCD with no

 

 

 

 

 

 

 

 

beep or one short beep.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

System

status

indicator

is 1.System Board

 

 

 

 

 

incorrectly

 

blinking

or

stays2.

Related Device

 

 

on.

 

 

 

 

 

 

 

 

3.

Indicator Assembly

 

 

 

 

 

 

 

 

 

 

 

System

status

indicator

 

1.System Board

 

 

 

 

 

stays off, but the POST

2.

Related Device

 

 

ends without

 

an

error.

3.

Indicator Assembly

 

 

 

 

 

 

 

No keys on the keyboard

1.Keyboard Control

 

 

 

 

work.

 

 

 

 

 

 

 

Card

 

 

 

 

 

 

See

“1080 Keyboard

Unit”

2.

Keyboard

 

 

 

on page 54.

 

 

 

 

 

3.

External

Keyboard

 

or

 

 

 

 

 

 

 

 

 

Numeric

Keypad

(if

 

 

 

 

 

 

 

 

 

 

attached)

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

System Board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Keypad

problems.

 

 

 

1.Reseat cable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

External Keypad

 

 

 

 

 

 

 

 

 

 

 

 

3.

Keyboard

Control

Card

 

 

 

 

 

 

 

 

 

4.

System Board

 

 

 

 

 

 

 

 

 

One or more keys do not

1.See “1080

Keyboard

 

 

 

work.

 

 

 

 

 

 

 

Unit”

on

page

54

 

 

 

 

 

 

 

 

 

 

 

 

before

replacing

any

 

 

 

 

 

 

 

 

 

 

 

 

FRUs.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Keyboard

 

 

 

 

 

 

 

 

 

 

 

 

3.

External

Keyboard

 

or

 

 

 

 

 

 

 

 

 

Numeric

Keypad

(if

 

 

 

 

 

 

 

 

 

attached)

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Keyboard

Control

Card

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90 IBM Mobile Systems HMM