IBM 1400 (2611) manual Indicator-Related Symptoms, ThinkPad i Series 1400 41Part

Symptom/Error	FRU/Action in		Sequence
No beep, power-on	Ÿ Power source (battery and
indicator turns on	and	adapter).		See	“Power
LCD is blank.		Systems Check”			on	page 25.
	Ÿ	Reconnect		the	LCD	connector
	Ÿ	Charger board
	Ÿ	Processor board
	Ÿ	Hard	disk	drive

Ÿ LCD inverter ID

ŸLCD LVDS board (for 13.3–inch LCD)

Ÿ LCD FPC cable

ŸInverter

ŸLCD

ŸSystem board

LCD

backlight

doesn't

Ÿ

Enter BIOS

Utility

and

work.

execute "Load

Setup

Default

LCD

is

too

dark.

Settings";

then

reboot

the

system.

LCD

brightness

cannot

be adjusted. Ÿ

Reconnect the LCD connec-

LCD

contrast

cannot

tors

Ÿ

Keyboard

(if

contrast

and

be

adjusted.

brightness

function

keys

do

not

work)

Ÿ

LCD

inverter

ID

Ÿ

LCD

LVDS

board

(for

13.3–inch

LCD)

Ÿ

LCD

FPC

cable

Ÿ

LCD inverter

Ÿ

LCD

Ÿ

System board

Unreadable

LCD

Ÿ

Reconnect all LCD connec-

screen.

tors

Missing

pels

in char- Ÿ

LCD

inverter

ID

acters.

Ÿ

LCD

FPC

cable

Abnormal

screen

Ÿ

LCD inverter

Wrong

color

dis-

Ÿ

LCD

played.

Ÿ

System board

LCD has extra hori- Ÿ LCD

zontal or vertical lines

Ÿ LCD FPC cable

displayed.

Ÿ LCD inverter ID

ŸInverter

ŸSystem board

Indicator-Related Symptoms

ThinkPad i Series 1400 41(Part I)