Lenovo ThinkCentre M55 User Manual
Lenovo ThinkCentre M55 Manual
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- Lenovo ThinkCentre M55 | User Manual - Page 1
User Guide Types 8011, 8793, 8797, 8801 Types 8805, 8810, 8814 - Lenovo ThinkCentre M55 | User Manual - Page 2
- Lenovo ThinkCentre M55 | User Manual - Page 3
User Guide Types 8011, 8793, 8797, 8801 Types 8805, 8810, 8814 - Lenovo ThinkCentre M55 | User Manual - Page 4
. All rights reserved. U.S. GOVERNMENT USERS - RESTRICTED RIGHTS: Our products and/or services are provided with RESTRICTED RIGHTS. Use, duplication or disclosure by the Government is subject to the GSA ADP Schedule contract with Lenovo Group Limited, if any, or the standard terms of this commercial - Lenovo ThinkCentre M55 | User Manual - Page 5
options 14 Specifications 15 Supported operating positions 16 Tools required 17 Handling static-sensitive devices 17 Installing external options 18 Locating connectors on the front of your computer 18 Locating connectors on the rear of your computer 19 Obtaining device drivers 20 Opening the - Lenovo ThinkCentre M55 | User Manual - Page 6
Center 61 Access Help 62 Warranty and safety 62 www.lenovo.com 62 Help and service 62 Using the documentation and diagnostic programs 63 Calling for service 63 Using other services 64 Purchasing additional services 64 Appendix A. Manual modem commands 65 Basic AT commands 65 Extended AT - Lenovo ThinkCentre M55 | User Manual - Page 7
of danger. If you have any questions about the condition of a component, do not use the product. Contact the Customer Support Center or the product manufacturer for instructions on how to inspect the product and have it repaired, if necessary. © Lenovo 2005, 2006. Portions © IBM Corp. 2005. v - Lenovo ThinkCentre M55 | User Manual - Page 8
instructed to do so by the Customer Support Center or your documentation. Only use a service provider who is approved to repair your particular product. Note: Some computer parts can be upgraded or replaced by the customer. These parts are referred to as Customer Replaceable Units, or CRUs. Lenovo - Lenovo ThinkCentre M55 | User Manual - 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 - Lenovo ThinkCentre M55 | User Manual - Page 10
outlet. Batteries All personal computers manufactured by Lenovo service any battery. Do not crush, puncture, or incinerate batteries or short circuit the metal contacts. Do not expose the battery to water or other liquids. Only recharge the battery pack strictly according to instructions Guide - Lenovo ThinkCentre M55 | User Manual - Page 11
for dust accumulation at least once every three months. Before inspecting your computer, turn off the power and unplug the computer's power cord from the electrical outlet; then remove any dust from vents and perforations in the bezel. If you notice external dust accumulation, you should also - Lenovo ThinkCentre M55 | User Manual - Page 12
and DVD discs, or force them into the computer or their packaging. v Check CD and DVD you open the device covers, unless instructed otherwise in the installation and configuration outlet. 3. Remove signal cables from connectors. 4. Remove all cables from devices. Lithium battery notice x User Guide - Lenovo ThinkCentre M55 | User Manual - Page 13
vicinity of the leak. Laser compliance statement Some personal computer models are equipped from the factory with a CD- is installed, note the following handling instructions. Caution Use of controls or adjustments to hazardous laser radiation. There are no serviceable parts inside the CD-ROM drive or - Lenovo ThinkCentre M55 | User Manual - Page 14
that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician. xii User Guide - Lenovo ThinkCentre M55 | User Manual - Page 15
page 55 provides information about basic troubleshooting and diagnostic tools for your computer. v Chapter 8, "Getting information, help, and service," on page 61 provides information about the wide variety of helpful resources available from Lenovo. v Appendix A, "Manual modem commands," on page 65 - Lenovo ThinkCentre M55 | User Manual - Page 16
xiv User Guide - Lenovo ThinkCentre M55 | User Manual - Page 17
computer, arrange both the equipment you use and your work area to suit your needs and the kind of work you do. Your comfort is of foremost importance, but light sources, air circulation, and the location of electrical outlets Back Support Seat Height Lenovo 2005, 2006. Portions © IBM Corp. 2005. 1 - Lenovo ThinkCentre M55 | User Manual - Page 18
have exhausted other methods of reducing glare. Dust buildup compounds problems associated with glare. Remember to clean your monitor screen of extension cords. When possible, plug the computer power cord directly into an electrical outlet. v Keep power cords and cables neatly computer. 2 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 19
described in this section. 1. Check the position of the voltage-selection switch on the rear of the computer. Use a ballpoint pen to slide the switch, if necessary. v If the voltage supply range is Bus (USB) keyboard cable to a USB connector. 115 © Lenovo 2005, 2006. Portions © IBM Corp. 2005. 3 - Lenovo ThinkCentre M55 | User Manual - Page 20
turn on your computer, refer to the Access Help online help system for information about your fingerprint reader. See "Access Help" on page 62 for instructions on how to cable to the connector as shown. 4 User Guide Note: Your computer must have an adapter installed that supports the DVI monitor. - Lenovo ThinkCentre M55 | User Manual - Page 21
cable to the modem connector on the back of the computer and the other end to the telephone outlet. 3 In countries or regions that do not use RJ-11 telephone outlets, a splitter or converter is required to attach the cables to the telephone outlet, as shown at the top of the illustration. You - Lenovo ThinkCentre M55 | User Manual - Page 22
instructions. a. Connect the cable that runs between the speakers, if necessary. On some speakers, this cable is permanently attached. b. Connect the speakers to the computer. 9. Connect any additional devices that you have. Your computer might not have all connectors that are shown. 6 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 23
connector to attach the computer to an Ethernet-type local area network or to a cable modem. Important: To operate the computer within FCC limits when outlets. Note: Refer to the Access Help online help system for more information about connectors. See "Access Help" on page 62 for instructions - Lenovo ThinkCentre M55 | User Manual - Page 24
closes. If your computer has preinstalled software, the software installation program starts. If you experience any problems during startup, see Chapter 7, "Troubleshooting and diagnostics," on page 55. For additional help, refer to Chapter 8, "Getting information, help, and service," on page 61 - Lenovo ThinkCentre M55 | User Manual - Page 25
operating system CDs or diskettes. Remember to install all device drivers after you install your operating system. Installation instructions are usually provided with the device drivers. Updating your antivirus software Your computer comes with the Symantec Client Security software you can use to - Lenovo ThinkCentre M55 | User Manual - Page 26
10 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 27
computer. You can expand the capabilities of your computer by adding memory, adapters, or drives. When installing an option, use these instructions along with the instructions Lenovo. This section provides an overview of the computer by model type) Memory v Support for four double data rate dual - Lenovo ThinkCentre M55 | User Manual - Page 28
a Video Graphics Array (VGA) monitor v Intel Graphics Media Accelerator 3000 with dual display support v PCI Express (x16) graphics adapter connector on the system board Audio subsystem The integrated HD -bit PCI adapter connectors v One low-profile PCI Express (x16) adapter connector 12 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 29
computer might come with preinstalled software. If it does, an operating system, device drivers to support built-in features, and other support press. Additional operating systems might be identified by Lenovo as compatible with your computer following the publication of this booklet. Corrections and - Lenovo ThinkCentre M55 | User Manual - Page 30
(x16) adapter - Optical drive, such as CD drives and DVD drives (some models) - Hard disk drive For the latest information about available options, see the Lenovo Web site at http://www.lenovo.com/ or contact your reseller or marketing representative. 14 User - Lenovo ThinkCentre M55 | User Manual - Page 31
Specifications This section lists the physical specifications for your computer. Dimensions Width: 350 mm (13.8 in.) Height: 107.9 mm (4.2 in.) Depth: 385 mm (15.2 in.) Weight Minimum configuration as shipped: 8.4 kg (18.5 lbs) Maximum configuration: - Lenovo ThinkCentre M55 | User Manual - Page 32
Supported operating positions To provide proper air flow to internal components, you must position your computer in one of the positions as illustrated below. Note: In the vertical position, the speaker vents should face up to ensure optimal sound. 16 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 33
When you add an option, do not open the static-protective package containing the option until you are instructed to do so. When you handle options and other computer components, take these precautions to avoid static electricity damage: v Limit your movement. Movement can cause static electricity to - Lenovo ThinkCentre M55 | User Manual - Page 34
shows the various external connectors on your computer to which you can attach external options, instructions that come with the option to help you make the connection and install any software or device drivers that are required for the option. Locating connectors on the front of your computer - Lenovo ThinkCentre M55 | User Manual - Page 35
The following illustration shows locations of connectors on the rear of your computer. 1 Power cord connector 2 Rope clip holes 3 Serial connector (some models) Note: Some connectors on the rear of your computer are color-coded to help determine where to connect the cables. Chapter 3. Installing - Lenovo ThinkCentre M55 | User Manual - Page 36
Note: To operate the computer within FCC Class B drivers You can obtain device drivers for operating systems that are not preinstalled at http://www.lenovo.com/think/support/ on the World Wide Web. Installation instructions are provided in README files with the device-driver files. 20 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 37
) from the drives, shut down your operating system, and turn off all attached devices and computer. 2. Unplug all power cords from electrical outlets. 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to - Lenovo ThinkCentre M55 | User Manual - Page 38
Locating components The following illustration will help you locate the various components in your computer. 1 Power supply assembly 2 Internal speaker 3 Diskette drive 4 Optical drive 5 Hard disk drive 6 Microprocessor and heat sink 7 Memory module 8 PCI riser assembly 9 PCI - Lenovo ThinkCentre M55 | User Manual - Page 39
on the system board The system board (sometimes called the planar or motherboard) is the main circuit board in your computer. It provides basic computer functions and supports a variety of devices that are installed or that you can install later. The following illustration shows the locations of - Lenovo ThinkCentre M55 | User Manual - Page 40
Installing memory Your computer has four connectors for installing double date rate dual inline to 8.0GB). Note: Only DDR2 SDRAM DIMMs can be used. To install a memory module: 1. Open the computer cover. See "Opening the cover" on page 21. 2. Pivot the drive bay assembly upward. 3. Locate the memory - Lenovo ThinkCentre M55 | User Manual - Page 41
the installation, go to "Closing the cover and connecting the cables" on page 39. Installing PCI adapters This section provides information and instructions for installing and removing PCI adapters. Your computer has a riser card with two PCI adapter connectors. To install a PCI adapter: 1. Open the - Lenovo ThinkCentre M55 | User Manual - Page 42
2. While holding the left rear of the computer chassis down, pull upward on the handle provided to remove the PCI riser and any adapters that are currently remove the connector cover for the appropriate expansion connector. 4. Remove the adapter from its static-protective package. 26 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 43
, go to "Closing the cover and connecting the cables" on page 39. Installing internal drives This section provides information and instructions for installing and removing internal drives. Internal drives are devices that your computer uses to read and store data. You can add drives to your - Lenovo ThinkCentre M55 | User Manual - Page 44
Drive specifications Your computer comes with the following installed drives: v An optical drive in bay 1 (some models) v drive (preinstalled) * You can obtain a Universal Adapter Bracket, 5.25 to 3.5-inch from a local computer retailer or by contacting the Customer Support Center. 28 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 45
drive or an additional hard disk drive in bay 1, do the following: 1. Open the computer cover. See "Opening the cover" on page 21. 2. Remove the plastic panel from You can obtain this bracket from a local computer retailer or by contacting the Customer Support Center. Chapter 3. Installing options 29 - Lenovo ThinkCentre M55 | User Manual - Page 46
6. Install the drive into the bay until it snaps into position. 7. Continue at "Connecting drives." Connecting drives The steps to connect a drive are different depending on the type of drive you are connecting. Use the following procedures for your drive connection. 30 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 47
Connecting additional serial ATA hard disk drive A serial hard disk drive can be connected to any available SATA connector. 1. Locate the signal cable that comes with the new drive. 2. Locate the available SATA connector on the system board. See "Identifying parts on the system board" on page 23. 3. - Lenovo ThinkCentre M55 | User Manual - Page 48
a diskette drive in bay 2 To install a diskette drive in bay 2, do the following: 1. Open the computer cover. See "Opening the cover" on page 21. 2. Pivot the drive bay assembly upward. 3. Remove the cable to the new drive. 6. Install a retainer bracket on the side of the drive. 32 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 49
7. Install the new drive from the rear of the drive bay assembly. What to do next: v To work with another option, go to the appropriate section. v To complete the installation, go to "Closing the cover and connecting the cables" on page 39. Chapter 3. Installing options 33 - Lenovo ThinkCentre M55 | User Manual - Page 50
computer, several security lock options are available. The following sections will help you identify and install the various types of locks that might be available for your computer . In addition to a physical lock, unauthorized use of your computer with other computer cables. Identifying security locks - Lenovo ThinkCentre M55 | User Manual - Page 51
a desk, table, or other non-permanent fixture. Rope clip knockouts at the rear of the chassis are provided. To install a rope clip: 1. Open the computer cover. See "Opening the cover" on page 21. 2. Use a tool, such as a screwdriver, to remove the two metal knockouts. 3. Insert the rope clip through - Lenovo ThinkCentre M55 | User Manual - Page 52
key. The cable lock also locks the buttons used to open the computer cover. This is the same type of lock used with many laptop computers. You can order a security cable directly from http://www.lenovo.com/think/support/ and search on Kensington. Password protection To deter unauthorized use of your - Lenovo ThinkCentre M55 | User Manual - Page 53
the battery fails, the date, time, and configuration information (including passwords) are lost. An error message is displayed when you turn on the computer. Refer to "Lithium battery notice" on page x for information about replacing and disposing of the battery. To change the battery: 1. Open the - Lenovo ThinkCentre M55 | User Manual - Page 54
computer cover, and connect the cables. See "Closing the cover and connecting the cables" on page 39. Note: When the computer computer computer computer computer, leave it on for approximately 10 seconds. Turn off the computer by holding the power switch for approximately 5 seconds. The computer - Lenovo ThinkCentre M55 | User Manual - Page 55
on the option that is installed, you might need to confirm the updated information in the Setup Utility program. To close the computer cover and connect cables to your computer: 1. Ensure that all components have been reassembled correctly and that no tools or loose screws are left inside your - Lenovo ThinkCentre M55 | User Manual - Page 56
40 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 57
the Windows operating system. If you encounter a problem, use the recovery tools from either the environment. Creating and using product recovery discs If your computer is equipped with a recordable CD or DVD drive, instructions on the screen. © Lenovo 2005, 2006. Portions © IBM Corp. 2005. 41 - Lenovo ThinkCentre M55 | User Manual - Page 58
or DVD drive. 2. Restart your computer. 3. After a short delay, the system. 5. Follow the instructions on the screen. reinstall some software or drivers. See "Using the a second hard disk installed in your computer v On an externally attached USB hard . 3. Follow the instructions on the screen. - Lenovo ThinkCentre M55 | User Manual - Page 59
from a backup icon. 3. Follow the instructions on the screen. For information about performing Recovery workspace, do the following: 1. Turn off your computer. 2. Restart your computer. 3. Repeatedly press and release F11. 4. When you problems" on page 44. 6. Do one of the following - Lenovo ThinkCentre M55 | User Manual - Page 60
follow the instructions on the screen. Note drivers for some devices. See "Recovering or installing device drivers" on page 46. 2. Some computers computers that come with Microsoft Office or Microsoft Works preinstalled. Solving recovery problems hard disk. 44 User Guide Note: The rescue disc, - Lenovo ThinkCentre M55 | User Manual - Page 61
Start your computer and operating system. 2. Using an Internet browser, go to the following Web address: http://www.lenovo.com/think/support/site.wss/ off the computer. 2. Insert the Recovery Repair diskette into diskette drive A. 3. Turn on the computer and follow the instructions on the screen - Lenovo ThinkCentre M55 | User Manual - Page 62
also available on the World Wide Web at http://www.lenovo.com/support/. To reinstall a device driver for a factory-installed device, do the following: 1. Start your computer and operating system. 2. Use Windows Explorer or My Computer to display the directory structure of your hard disk. 3. Open - Lenovo ThinkCentre M55 | User Manual - Page 63
Setup Utility, then press Enter. 8. When the Setup Confirmation window appears, press Enter. 9. The computer restarts. Note: If you are using an external device, you first must turn off your computer before connecting the external device. For more information on Setup Utility, see Chapter 5, "Using - Lenovo ThinkCentre M55 | User Manual - Page 64
48 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 65
Utility program, you can set passwords to prevent unauthorized persons from gaining access to your computer and data. The following types of passwords are available: v User Password v Administrator symbols v You can also use the space bar © Lenovo 2005, 2006. Portions © IBM Corp. 2005. 49 - Lenovo ThinkCentre M55 | User Manual - Page 66
: Not all CDs, hard disks, and diskettes are startable (bootable). 1. Turn off your computer. 2. Press and hold the F12 key then turn on the computer. When the Startup Device Menu appears, release the F12 key. 50 User Guide Note: If you are using a USB keyboard and the Startup Device Menu does not - Lenovo ThinkCentre M55 | User Manual - Page 67
Defaults and are using an operating system other than Windows XP, your computer performance might be degraded. Therefore, you should always set HyperThreading to Disabled unless you are sure your operating system supports HyperThreading. Exiting from the Setup Utility program When you finish viewing - Lenovo ThinkCentre M55 | User Manual - Page 68
52 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 69
available at http://www.lenovo.com/support on the World Wide Web. 2. Turn on the computer. If the computer is on already, you must turn it off and back on again. The update begins. 3. Follow the instructions on the screen to complete the update. © Lenovo 2005, 2006. Portions © IBM Corp. 2005. 53 - Lenovo ThinkCentre M55 | User Manual - Page 70
54 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 71
or rear of the computer. v No keys are stuck. If you cannot correct the problem, have the computer serviced. Refer to the warranty and safety information that is provided with your computer for a list of service and support telephone numbers. © Lenovo 2005, 2006. Portions © IBM Corp. 2005. 55 - Lenovo ThinkCentre M55 | User Manual - Page 72
multiple times before the operating system starts. If you cannot correct the problem, have the computer serviced. Refer to the warranty and safety information that is provided with your computer for a list of service and support telephone numbers. Verify that no keys are stuck down. If you cannot - Lenovo ThinkCentre M55 | User Manual - Page 73
view symptoms and solutions for computer problems, access the Lenovo troubleshooting center, update system drivers, and review system information. from http:// www.lenovo.com/support/. After you download the image, you can create the CD using any CD burning software. If your computer does not have a - Lenovo ThinkCentre M55 | User Manual - Page 74
the prompts on the screen. The computer will reboot. 6. When the computer restarts, the diagnostic program opens automatically. Select the diagnostic test you want to run. Press the F1 key for additional help. Cleaning the mouse This section provides instructions on how to clean your mouse. The - Lenovo ThinkCentre M55 | User Manual - Page 75
(DSP) to determine changes in the mouse position. 5. Reconnect the mouse cable to the computer. 6. Turn your computer back on. Non-optical mouse The non-optical mouse uses a ball to navigate the pointer Retainer ring 2 Ball 3 Plastic rollers 4 Ball cage Chapter 7. Troubleshooting and diagnostics 59 - Lenovo ThinkCentre M55 | User Manual - Page 76
To clean a mouse with a ball, follow the instructions below: 1. Turn off your computer. 2. Disconnect the mouse cable from the computer. 3. Turn the mouse upside down. Twist the retainer ring 1 position. 11. Reconnect the mouse cable to the computer. 12. Turn your computer back on. 60 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 77
to view the PDF file and you will be guided through the Adobe Acrobat Reader installation. 2. The publications that are preinstalled on your computer are available in other languages on the Lenovo Support Web site at http://www.lenovo.com/ support/. 3. If you want to install a different language - Lenovo ThinkCentre M55 | User Manual - Page 78
device drivers and software updates for your computer model. v Access the online manuals for your products. v Access the Lenovo Statement of Limited Warranty. v Access troubleshooting and support information for your computer model and other supported products. v Find the service and support phone - Lenovo ThinkCentre M55 | User Manual - Page 79
you can get the latest technical information and download device drivers and updates. To access these pages, go to http://www.lenovo.com/support/ and follow the instructions. Calling for service If you have tried to correct the problem yourself and still need help, during the warranty period you - Lenovo ThinkCentre M55 | User Manual - Page 80
might apply at the time of service. To determine whether your computer is eligible for International Warranty Service and to view a list of the countries where service is available, go to http://www.lenovo.com/support/, click Warranty, and follow the instructions on the screen. For technical - Lenovo ThinkCentre M55 | User Manual - Page 81
, @ ! ; DS=n E_ E0 E1 +++ H_ H0 Function Manually answer incoming call. Repeat last command executed. Do not precede A/ with number redial pulse dialing Note: Pulse dialing is not supported for Australia, New Zealand, Norway, and South Africa. Lenovo 2005, 2006. Portions © IBM Corp. 2005. 65 - Lenovo ThinkCentre M55 | User Manual - Page 82
? Sr=n T V_ V0 V1 W_ W0 W1 W2 X_ X0 X1 X2 X3 X4 Z_ Z0 Z1 66 User Guide Function Force modem off-hook (make busy) Note: H1 command is not supported for Italy Display product-identification code Factory ROM checksum test Internal memory test Firmware ID Reserved ID Low speaker - Lenovo ThinkCentre M55 | User Manual - Page 83
Digital Loopback Test Perform a Remote Digital Loopback Test and Self-Test Perform Local Analog Loopback Test and Self-Test Displays Active and Stored Profiles Appendix A. Manual modem commands 67 - Lenovo ThinkCentre M55 | User Manual - Page 84
as Profile 1 Disable auto-retrain Enable auto-retrain Displays the current Select Modulation settings Displays a list of supported Select Modulation options Select modulation where: a=0, 1, 2, 3, 9, 10, 11, 12, 56, 64 \N0) Disable V.44 Enable V.44 Current values List of support values 68 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 85
FDTC: +FET: +FET=N +FHNG +FK +FLID= +FLPL +FMDL? +FMFR? Data/Fax Auto Answer Service Class Receive data with HDLC framing Receive data Receive silence Transmit data with HDLC framing Transmit data Stop transmission and . Identify model. Identify manufacturer. Appendix A. Manual modem commands 69 - Lenovo ThinkCentre M55 | User Manual - Page 86
Silence detection period Sampling rate selection Silence deletion tuner DTMF tone reporting capability Enable timing mark placement Generate tone signals Voice transmit mode 70 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 87
. The impairment may be resolved by a filter with the following specifications: Telekom PTT SCR-BE Taximpulssperrfilter-12kHz PTT Art. 444.112.7 Bakom 93.0291.Z.N Appendix A. Manual modem commands 71 - Lenovo ThinkCentre M55 | User Manual - Page 88
72 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 89
program, or service. Lenovo may have Attention: Lenovo Director of Licensing LENOVO GROUP LTD publication. Lenovo may other life support applications where Lenovo of Lenovo or vary. Lenovo may use this publication to non-Lenovo Web sites are of the materials for this Lenovo product, and use of those - Lenovo ThinkCentre M55 | User Manual - Page 90
following terms are trademarks of Lenovo in the United States, other countries, or both: Lenovo Rescue and Recovery ThinkCentre ThinkVantage Wake on LAN is United States, other countries, or both. Other company, product, or service names may be trademarks or service marks of others. 74 User Guide - Lenovo ThinkCentre M55 | User Manual - Page 91
38 components, internal 22 computer connecting 3 shutting down 9 turning on computer 8 connecting drives 30 connector description 20 connectors front 18 rear 19 cover closing 39 opening 21 Customer Replacement Units (CRUs) 62 Customer Support Center 63 D device drivers 20 installing 46 recovering - Lenovo ThinkCentre M55 | User Manual - Page 92
support 13 Advanced Power Management support 13 features 13 turning off computer 9 turning on 8 power-on self-test (POST) 53 product recovery disks 41 R recovering software 41 recovery problems 46 76 User Guide software installing 8 Center 61 trademarks 74 troubleshooting 55 U updating (flashing - Lenovo ThinkCentre M55 | User Manual - Page 93
- Lenovo ThinkCentre M55 | User Manual - Page 94
Part Number: 41X6154 Printed in USA (1P) P/N: 41X6154
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User
Guide
Types
8011,
8793,
8797,
8801
Types
8805,
8810,
8814