IBM manual 54

2.Check the cables, wires, and connectors for short circuits and open circuits. Visually check them for damage. If any problems are found, replace the

FRU.

3. Remove or disconnect all of the following devices.

a.Non-IBM devices

b.Devices attached to the expansion bus connector

c.Printer, mouse, and other external devices

d.Battery pack

e. IC DRAM card f. PC cards

Note:

Remember

that

removing

the hard

disk

drive,

an

IC

DRAM

card,

or

any

adapter

or device, might cause configuration

errors. Ignore error code 174.

4.

Power-on

the

computer.

5.

Determine

if

the

problem

has

changed.

6. If

the problem does not occur again, reconnect the

removed

devices

one

at

a

time

until

you

find

the

failing FRU.

7.

If

the

problem

remains, replace

the

following

FRUs

one

at

a

time. Do

not

replace a non-defective FRU.

Ÿ

Modem

card

(if

installed)

ŸLCD assembly

ŸSystem board

Related Service Procedures

This section provides information about the following:

Ÿ	“Status			Indicators”		on	page 44
Ÿ	“How		to	Run the Diagnostics” on page 45
Ÿ	“Error		Log” on		page 45
Ÿ	“Reset			Pushbutton”		on	page 46
Ÿ	“Checking			the	Installed		Devices List”	on page 46
Ÿ	“How		to	Run the Low Level Format” on				page 46
Ÿ	“PC	Test		Card	LED”	on	page 46
Ÿ	“Fn	Key		Combinations”		on	page 47

Ÿ“How To Run the Keyboard Diagnostics” on page 47

ThinkPad 340x (IBM 2610)43