IBM 2142, 2140 manual Repair Information, Point Locations, Safety Inspection Guide, Parts Catalog

Noncritical malfunctionscause incorrect results

that

might

not

be

apparent

to

the

user. An

example

of a noncritical error is a memory module failure. If a

noncritical error occurs, an error code is displayed, and the

testing is

stopped. Testing

can

be

continued

on a

noncritical

error

by

pressing

the

Esc

key.

After

a

successful

POST

(one

in

which

no

critical

errors

were

detected, and

no beep

generated),

The system attempts to load an operating

system. The

system

can be

customized

for

different

start

(boot)

methods.

The

system’s

default

startup

sequence

automatically

looks

for

the operating

system

files

on

the

hard

disk

if

the

files are

not

found

on

diskette.

Note:

Remember

that

the POST does not test all areas, but only

those

that

allow

the

system

to

operate

well

enough

to

run

the Diagnostics

and Utilities

program.

Repair Information

This chapter contains removal and replacement instructions.

Parts/Test		Point		Locations
This	chapter		contains		system board layouts and jumper	settings. It	is useful
when	you	are	asked		to measure voltages. Use this information to help you
locate parts			such as		electronic boards, connectors, pin numbers, and test
points. This chapter also contains jumper settings for						the hard disk	drive,
CD/DVD-ROM		drive,		and	Zip drive.

Safety Inspection Guide

This chapter contains guidelines to help you identify possible safety concerns. Use this information to inspect a machine for safety problems before putting the machine under a Maintenance Agreement.

Parts Catalog

This catalog includes figures, part numbers, and part names. It also contains detailed system board descriptions.

Part Number Index

This chapter contains part numbers listed in numerical order.

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