Lenovo ThinkCentre M55 (English) User guide - Page 9

Danger

Hazardous

moving

parts.

Keep

fingers

and

other

body

parts

away.

Attention

Before

replacing

any

CRUs,

turn

off

the

computer

and

wait

three

to

five

minutes

to

let

the

computer

cool

before

opening

the

cover.

Power

cords

and

power

adapters

Use

only

the

power

cords

and

power

adapters

supplied

by

the

product

manufacturer.

The

power

cords

shall

be

safety

approved.

For

Germany,

it

shall

be

H05VV-F,

3G,

0.75

mm

2

,

or

better.

For

other

countries,

the

suitable

types

shall

be

used

accordingly.

Never

wrap

a

power

cord

around

the

power

adapter

or

other

object.

Doing

so

can

stress

the

cord

in

ways

that

can

cause

the

cord

to

fray,

crack,

or

crimp.

This

can

present

a

safety

hazard.

Always

route

power

cords

so

that

they

will

not

be

walked

on,

tripped

over,

or

pinched

by

objects.

Protect

the

power

cords

and

power

adapters

from

liquids.

For

instance,

do

not

leave

your

power

cord

or

power

adapter

near

sinks,

tubs,

toilets,

or

on

floors

that

are

cleaned

with

liquid

cleansers.

Liquids

can

cause

a

short

circuit,

particularly

if

the

power

cord

or

power

adapter

have

been

stressed

by

misuse.

Liquids

can

also

cause

gradual

corrosion

of

the

power

cord

terminals

and/or

the

connector

terminals

on

the

power

adapters

which

can

eventually

result

in

overheating.

Always

connect

power

cords

and

signal

cables

in

the

correct

order

and

ensure

that

all

power

cord

connectors

are

securely

and

completely

plugged

into

receptacles.

Do

not

use

any

power

adapter

that

shows

corrosion

at

the

ac

input

pins

and/or

shows

signs

of

overheating

(such

as

deformed

plastic)

at

the

ac

input

or

anywhere

on

the

power

adapter.

Do

not

use

any

power

cords

where

the

electrical

contacts

on

either

end

show

signs

of

corrosion

or

overheating

or

where

the

power

cord

appears

to

have

been

damaged

in

any

way.

Important

safety

information

vii

Section	Page
Contents	5
Important safety information	7
Conditions that require immediate action	7
General safety guidelines	8
Service	8
Power cords and power adapters	9
Extension cords and related devices	10
Plugs and outlets	10
Batteries	10
Heat and product ventilation	11
CD and DVD drive safety	11
Additional safety information	12
Lithium battery notice	12
Modem safety information	13
Laser compliance statement	13
Power supply statement	14
Introduction	15
Chapter 1. Arranging your workspace	17
Comfort	17
Glare and lighting	17
Air circulation	18
Electrical outlets and cable lengths	18
Chapter 2. Setting up your computer	19
Connecting your computer	19
Turning on power	24
Finishing the software installation	24
Completing important tasks	24
Updating your operating system	25
Installing other operating systems	25
Updating your antivirus software	25
Shutting down the computer	25
Chapter 3. Installing options	27
Features	27
Specifications	30
Available options	30
Supported operating positions	31
Handling static-sensitive devices	31
Installing external options	32
Locating the connectors on the front of your computer	32
Locating the connectors on the rear of your computer	33
Obtaining device drivers	34
Opening the cover	35
Locating components	36
Identifying parts on the system board	36
Installing memory	37
Installing a PCI adapter	39
Installing an optical drive	41
Security features	43
Integrated cable lock	43
Password protection	44
Changing the battery	44
Erasing a lost or forgotten password (clearing CMOS)	46
Closing the cover and connecting the cables	47
Chapter 4. Recovering software	49
Creating and using product recovery discs	49
Backup and recovery	50
Using the Rescue and Recovery workspace	51
Solving recovery problems	52
Creating and using rescue media	52
Creating and using a Recovery Repair diskette	53
Recovering or installing device drivers	54
Setting a rescue device in the startup sequence	54
Chapter 5. Using the Setup Utility	57
Starting the Setup Utility program	57
Viewing and changing settings	57
Using passwords	57
Password considerations	57
User Password	58
Administrator Password	58
Setting, changing, and deleting a password	58
Selecting a startup device	58
Selecting a temporary startup device	58
Changing the startup device sequence	59
Advanced settings	59
Exiting from the Setup Utility program	59
Chapter 6. Updating system programs	61
Using system programs	61
Updating (flashing) BIOS from a diskette	61
Chapter 7. Troubleshooting and diagnostics	63
Basic troubleshooting	63
Diagnostic programs	64
PC-Doctor for Windows	65
PC-Doctor for DOS	65
Creating a diagnostic CD image	65
Creating diagnostic diskettes	65
Running diagnostics from the CD or diskettes	66
Running diagnostics from the Rescue and Recovery workspace	66
Cleaning the mouse	66
Optical mouse	67
Non-optical mouse	67
Chapter 8. Getting information, help, and service	69
Information resources	69
Online Books folder	69
ThinkVantage Productivity Center	69
Access Help	70
Warranty and safety	70
www.lenovo.com	70
Help and service	70
Using the documentation and diagnostic programs	71
Calling for service	71
Using other services	72
Purchasing additional services	72
Appendix A. Manual modem commands	73
Basic AT commands	73
Extended AT commands	75
MNP/V.42/V.42bis/V.44 commands	76
Fax Class 1 commands	77
Fax Class 2 commands	77
Voice commands	78
Appendix B. Notices	81
Television output notice	82
Trademarks	82

Lenovo ThinkCentre M55 (English) User guide - Page 9

Power, cords, power, adapters

Page 9 highlights