Lenovo ThinkCentre M55 (English) User guide - Page 12

v

Remove

CD

and

DVD

discs

from

the

computer

when

not

in

use.

v

Do

not

bend

or

flex

CD

and

DVD

discs,

or

force

them

into

the

computer

or

their

packaging.

v

Check

CD

and

DVD

discs

for

cracks

before

each

use.

Do

not

use

cracked

or

damaged

discs.

Additional

safety

information

Danger

Electrical

current

from

power,

telephone,

and

communication

cables

is

hazardous.

To

avoid

a

shock

hazard:

v

Do

not

connect

or

disconnect

any

cables

or

perform

installation,

maintenance,

or

reconfiguration

of

this

product

during

an

electrical

storm.

v

Connect

all

power

cords

to

a

properly

wired

and

grounded

electrical

outlet.

v

Connect

to

properly

wired

outlets

any

equipment

that

will

be

attached

to

this

product.

v

When

possible,

use

one

hand

only

to

connect

or

disconnect

signal

cables.

v

Never

turn

on

any

equipment

when

there

is

evidence

of

fire,

water,

or

structural

damage.

v

Disconnect

the

attached

power

cords,

telecommunications

systems,

networks,

and

modems

before

you

open

the

device

covers,

unless

instructed

otherwise

in

the

installation

and

configuration

procedures.

v

Connect

and

disconnect

cables

as

described

in

the

following

table

when

installing,

moving,

or

opening

covers

on

this

product

or

attached

devices.

To

connect:

1.

Turn

everything

OFF.

2.

First,

attach

all

cables

to

devices.

3.

Attach

signal

cables

to

connectors.

4.

Attach

power

cords

to

outlet.

5.

Turn

device

ON.

To

disconnect:

1.

Turn

everything

OFF.

2.

First,

remove

power

cords

from

outlet.

3.

Remove

signal

cables

from

connectors.

4.

Remove

all

cables

from

devices.

Lithium

battery

notice

Caution

Danger

of

explosion

if

battery

is

incorrectly

replaced.

When

replacing

the

lithium

coin

cell

battery,

use

only

the

same

or

an

equivalent

type

that

is

recommended

by

the

manufacturer.

The

battery

contains

lithium

and

can

explode

if

not

properly

used,

handled,

or

disposed

of.

Do

not:

v

Throw

or

immerse

into

water

v

Heat

to

more

than

100°

C

(212°

F)

v

Repair

or

disassemble

x

User

Guide

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 12

Additional, safety, information, Lithium, battery, notice

Page 12 highlights