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Lenovo ThinkCentre M55 User Manual - Page 54

Erasing, forgotten, password, clearing

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5. Install the new battery. 6. Reinstall the PCI riser assembly if removed. 7. Close the computer cover, and connect the cables. See "Closing the cover and connecting the cables" on page 39. Note: When the computer is turned on for the first time after battery replacement, an error message might be displayed. This is normal after replacing the battery. 8. Turn on the computer and all attached devices. 9. Use the Setup Utility program to set the date and time and any passwords. See Chapter 5, "Using the Setup Utility," on page 49. Erasing a lost or forgotten password (clearing CMOS) This section applies to lost or forgotten passwords. For more information about lost or forgotten passwords, go to the ThinkVantage Productivity Center. To erase a forgotten password: 1. Open the computer cover. See"Opening the cover" on page 21. 2. Locate the Clear CMOS/Recovery jumper on the system board. See "Identifying parts on the system board" on page 23. 3. Move the jumper from the standard position (pins 1 and 2) to the maintenance or configure position (pins 2 and 3). 4. Lower the drive bay assembly and reconnect any cables that were disconnected. 5. Close the computer cover and connect the power cord. See "Closing the cover and connecting the cables" on page 39. 6. Restart the computer, leave it on for approximately 10 seconds. Turn off the computer by holding the power switch for approximately 5 seconds. The computer will turn off. 7. Repeat steps 1 and 2 on page 38. 8. Move the Clear CMOS/Recovery jumper back to the standard position (pins 1 and 2). 9. Close the computer cover and connect the power cord. See "Closing the cover and connecting the cables" on page 39. 38 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
Available options	30
Specifications	31
Supported operating positions	32
Tools required	33
Handling static-sensitive devices	33
Installing external options	34
Locating connectors on the front of your computer	34
Locating connectors on the rear of your computer	35
Obtaining device drivers	36
Opening the cover	37
Locating components	38
Identifying parts on the system board	39
Installing memory	40
Installing PCI adapters	41
Installing internal drives	43
Drive specifications	44
Installing a drive in bay 1	45
Connecting drives	46
Connecting additional serial ATA hard disk drive	47
Installing a diskette drive in bay 2	48
Security features	50
Identifying security locks	50
Rope Clip	51
Integrated cable lock	52
Password protection	52
Changing the battery	53
Erasing a lost or forgotten password (clearing CMOS)	54
Closing the cover and connecting the cables	55
Chapter 4. Recovering software	57
Creating and using product recovery discs	57
Backup and recovery	58
Using the Rescue and Recovery workspace	59
Solving recovery problems	60
Creating and using rescue media	60
Creating and using a Recovery Repair diskette	61
Recovering or installing device drivers	62
Setting a rescue device in the startup sequence	62
Chapter 5. Using the Setup Utility	65
Starting the Setup Utility program	65
Viewing and changing settings	65
Using passwords	65
Password considerations	65
User Password	66
Administrator Password	66
Setting, changing, and deleting a password	66
Selecting a startup device	66
Selecting a temporary startup device	66
Changing the startup device sequence	67
Advanced settings	67
Exiting from the Setup Utility program	67
Chapter 6. Updating system programs	69
Using system programs	69
Updating (flashing) BIOS from a diskette	69
Chapter 7. Troubleshooting and diagnostics	71
Basic troubleshooting	71
Diagnostic programs	72
PC-Doctor for Windows	73
PC-Doctor for DOS	73
Creating a diagnostic CD image	73
Creating diagnostic diskettes	73
Running diagnostics from the CD or diskettes	74
Running diagnostics from the Rescue and Recovery workspace	74
Cleaning the mouse	74
Optical mouse	75
Non-optical mouse	75
Chapter 8. Getting information, help, and service	77
Information resources	77
Online Books folder	77
ThinkVantage Productivity Center	77
Access Help	78
Warranty and safety	78
www.lenovo.com	78
Help and service	78
Using the documentation and diagnostic programs	79
Calling for service	79
Using other services	80
Purchasing additional services	80
Appendix A. Manual modem commands	81
Basic AT commands	81
Extended AT commands	83
MNP/V.42/V.42bis/V.44 commands	84
Fax Class 1 commands	85
Fax Class 2 commands	85
Voice commands	86
Appendix B. Notices	89
Television output notice	90
Trademarks	90

Match case Limit results 1 per page

Install

the

new

battery.

Reinstall

the

PCI

riser

assembly

removed.

the

computer

cover,

and

connect

the

cables.

See

“Closing

the

cover

and

connecting

the

cables”

page

39.

Note:

When

the

computer

turned

for

the

first

time

after

battery

replacement,

error

message

might

displayed.

This

normal

after

replacing

the

battery.

Turn

the

computer

and

all

attached

devices.

Use

the

Setup

Utility

program

set

the

date

and

time

and

any

passwords.

See

Chapter

“Using

the

Setup

Utility,”

page

49.

Erasing

lost

forgotten

password

(clearing

CMOS)

This

section

applies

lost

forgotten

passwords.

For

information

about

lost

forgotten

passwords,

the

ThinkVantage

Productivity

Center.

erase

forgotten

password:

Open

the

computer

cover.

See“Opening

the

cover”

page

21.

Locate

the

Clear

CMOS/Recovery

jumper

the

system

board.

See

“Identifying

parts

the

system

board”

page

23.

Move

the

jumper

from

the

standard

position

(pins

and

the

maintenance

configure

position

(pins

and

3).

Lower

the

drive

bay

assembly

and

reconnect

any

cables

that

were

disconnected.

the

computer

cover

and

connect

the

power

cord.

See

“Closing

the

cover

and

connecting

the

cables”

page

39.

Restart

the

computer,

leave

for

approximately

seconds.

Turn

off

the

computer

holding

the

power

switch

for

approximately

seconds.

The

computer

will

turn

off.

Repeat

steps

and

page

38.

Move

the

Clear

CMOS/Recovery

jumper

back

the

standard

position

(pins

and

2).

the

computer

cover

and

connect

the

power

cord.

See

“Closing

the

cover

and

connecting

the

cables”

page

39.

User

Guide