Instruction/ maintenance manual of the product RD120 Lenovo
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ThinkS e rv e r RD 1 20 Ty p e s 6 444 , 6 4 45, 6 446, an d 64 4 7 Us e r Gu i d e.
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ThinkS e rv e r RD 1 20 Ty p e s 6 444 , 6 4 45, 6 446, an d 64 4 7 Us e r Gu i d e.
Note: Before using this information and the product it supports, read the general information in “Notices,” on page 91, and the Warranty and Support Information document on the ThinkServer Documentation DVD. Fourth Edition (April 2009) © Copyright Lenovo 2008, 2009.
Contents Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . .v Chapter 1. The ThinkServer RD120 server . . . . . . . . . . . . . .1 Related documentation . . . . . . . . . . . . . . . . . . . . . .2 Notices and statements in this document . .
Removing the fan-bracket assembly . . . . . . . . . . . . . . . . .7 0 Installing the fan-bracket assembly . . . . . . . . . . . . . . . . .7 2 Replacing the CD-RW/DVD drive . . . . . . . . . . . . . . . . . .7 3 Completing the installation . . . . . .
Safety Before installing this product, read the Safety Information. Antes de instalar este produto, leia as Informações de Segurança. Pred instal ací tohoto produktu si prectete prír uc ku bezpecnostních inst rukcí. Læs sikkerhedsforskrifterne, før du installerer dette produkt.
Important: Each caution and danger statement in this document is labeled with a number . This number is used to cross reference an English language caution or danger statement with translated versions of the caution or danger statement in the Safety Information document, which is provided on the ThinkServer Documentation DVD.
Statement 1: 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.
Statement 2: CAUTION: When replacing the lithium battery , use only the battery recommended by the manufacturer . If your system has a module containing a lithium battery , replace it only with the same module type made by the same manufacturer . The battery contains lithium and can explode if not properly used, handled, or disposed of.
Statement 3: CAUTION: When laser products (such as CD drives, DVD drives, fiber optic devices, or transmitters) are installed, note the following: v Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation.
Statement 4: ≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb) CAUTION: Use safe practices when lifting. Statement 5: CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device.
Statement 8: CAUTION: Never remove the cover on a power supply or any part 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.
Statement 15: CAUTION: Make sure that the rack is secured properly to avoid tipping when the server unit is extended. xii ThinkServer RD120 T ypes 6444, 6445, 6446, and 6447: User Guide.
Chapter 1. The ThinkServer RD120 server The Lenovo ® ThinkServer ™ RD120 (Machine T ypes 6444, 6445, 6446, and 6447) server is a 5-U-high, high-performance server . It is ideally suited for networking environments that require superior microprocessor performance, improved systems management, and flexible memory and data management.
Related documentation This User Guide contains general information about the server , including how to install supported optional devices and how to configure the server . The following documentation also comes with the server: v Installation Guide This document is in Portable Document Format (PDF) on the ThinkServer Documentation DVD.
v Note: These notices provide important tips, guidance, or advice. v Important: These notices provide information or advice that might help you avoid inconvenient or problem situations. v Attention: These notices indicate potential damage to programs, devices, or data.
T able 1. Features and specifications Microprocessor: v Intel ® Xeon ® FC-LGA 771 dual-core with 4 MB Level-2 cache or quad-core with 8 MB (2x4 MB) Level-2 cache v Support for up to two microprocessors v Support for Intel Extended Memory 64 T echnology (EM64T) Notes: 1.
threshold or if a system component fails, the baseboard management controller lights LEDs to help you diagnose the problem. v ThinkServer EasyStartup DVD The Lenovo ThinkServer EasyStartup DVD that comes with the server provides programs to help you set up the server and install an operating system.
v Easy LED Diagnostics Easy LED Diagnostics provides LEDs to help you diagnose problems. For more information, see the section about Easy LED Diagnostics in the Hardware Maintenance Manual .
v Systems-management capabilities The server supports an optional IBM Remote Supervisor Adapter II SlimLine. When you use this adapter , you can manage the functions of the server locally and remotely . The Remote Supervisor Adapter II SlimLine also provides system monitoring, event recording, and dial-out alert capability .
v System auto-configuring from the configuration menu v System error logging (POST and service processor) v Systems-management monitoring through the Inter-Integrated Circuit (I 2 C) bus v Upgradeable.
1 Operator information panel 7 Hard disk drive status LED (amber) 2 USB connector 8 Rack release latch 3 USB connector 9 CD/DVD eject button 4 Video connector.
v Information LED: When this LED is lit, it indicates that a noncritical event has occurred. An LED on the diagnostics panel is also lit to help isolate the error . v System-error LED: When this LED is lit, it indicates that a system error has occurred.
10 USB 3 connector 20 Power supply 1 Power-cord connector (ac power supply only): Connect the power cord to this connector . Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply .
Serial connector: Connect a 9-pin serial device to this connector . The serial port is shared with the baseboard management controller (BMC). The BMC can take control of the shared serial port to perform text console redirection and to redirect serial traffic, using Serial over LAN (SOL).
Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply .
14 ThinkServer RD120 T ypes 6444, 6445, 6446, and 6447: User Guide.
Chapter 2. Installing optional devices This chapter provides detailed instructions for installing optional hardware devices in the server . Server components The following illustrations show the major components in the server . The illustrations in this document might differ slightly from your hardware.
1 Cover 11 CD/DVD drive 2 Power-supply filler 12 Operator information panel 3 Power supply 13 Optional tape drive 4 Power backplane 14 T ape drive space filler 5 2.5-inch drive cage with hard disk drive backplane 15 T ape drive filler 6 2.
1 Riser-card assembly 8 VRM 2 Full-height adapter 9 Microprocessor 3 DIMM air baffle 10 Heat sink 4 DIMM 11 Heat-sink filler 5 RAID SAS controller 12 Remote Supervisor Adapter II SlimLine 6 System board 13 Low-profile adapter 7 Heat-sink retention module Chapter 2.
System-board optional-device connectors The following illustration shows the connectors on the system board for user-installable optional devices. 1 PCI Express slots 3 and 4 6 Fan connect.
PCI riser-card adapter connectors The following illustration shows the connectors 1 on the PCI riser card for user-installable PCI adapters. Note: For clarity , in the following illustration the PCI riser-card assembly is inverted.
System-board internal cable connectors The following illustration shows the internal connectors on the system board. 1 Hard disk drive backplane signal (J92) 7 CD/DVD signal (J37) 2 .
System-board external connectors The following illustration shows the external input/output connectors on the system board. 1 Ethernet connectors 1 and 2 and USB connectors 3 and 4 4 Serial connector 2 USB connectors 1 and 2 5 Systems-management Ethernet connector 3 Video connector 6 SAS connector Chapter 2.
System-board switches and jumpers The following illustration shows the switches and jumpers on the system board. Any switches or jumpers on the system board that are not shown in the illustration are reserved.
T able 2. Switches 1 - 8 Switch number Default value Switch description 8 Off Reserved. 7 Off Reserved. 6 Off Reserved. 5 Off Power-on password override.
System-board LEDs The following illustration shows the light-emitting diodes (LEDs) on the system board. 1 Riser-card-missing error LED 6 VRM error LED 2 RAID error LED 7 Micro.
Riser-card assembly LEDs The following illustration shows the light-emitting diodes (LEDs) on the riser-card assembly . 1 PCI slot 1 error LED 2 PCI slot 2 error LED Chapter 2.
Diagnostics panel The following illustration shows the controls and LEDs on the diagnostics panel. D ASD NMI PCI PS1 SP PS2 CNFG MEM CPU FA N VRM O VER SPEC TEMP REMIND S ERR Light P ath Diagnostics RAID BRD To access the diagnostics panel, slide the release latch on the front of the operator information panel to the left.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Hardware Maintenance Manual to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Hardware Maintenance Manual to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
Installation guidelines Before you install optional devices, read the following information: v Read the safety information that begins on page v and the guidelines in “Handling static-sensitive devices” on page 31. This information will help you work safely .
v Orange on a component or an orange label on or near a component indicates that the component can be hot-swapped, which means that if the server and operating system support hot-swap capability , you can remove or install the component while the server is running.
v Remove jewelry , such as bracelets, necklaces, rings, and loose-fitting wrist watches. v Remove items from your shirt pocket, such as pens and pencils, that could fall into the server as you lean over it. v A void dropping any metallic objects, such as paper clips, hairpins, and screws, into the server .
Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply .
1 Access holes 2 Release tabs To remove the riser-card assembly , complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices, and disconnect the power cord and all external cables.
Installing the riser-card assembly To install the riser-card assembly , complete the following steps. 1 Access holes 2 Guide 3 Release tabs 4 Guide 1. Read the safety information that begins on page v and “Installation guidelines” on page 29.
1 Microprocessor air baffle 2 Finger holes To remove the microprocessor air baffle, complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29.
Installing the microprocessor air baffle 1 Microprocessor air baffle 2 Finger holes To install the microprocessor air baffle, complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29.
Removing the DIMM air baffle When you work with some optional devices, you must first remove the DIMM air baffle to access certain components or connectors on the system board.
6. Press the handle 4 toward the finger hole and lift the air baf fle out of the server . Attention: For proper cooling and airflow , replace the air baffle before you turn on the server . Operating the server with an air baffle removed might damage server components.
4. Align the tabs on the sides of the air baf fle with the slots on the power-supply cage. 5. Place your fingers into the handle 4 and finger hole on the top of the DIMM air baffle.
1 PCI slot 1 2 PCI slot 2 3 PCI slot 3 4 PCI slot 4 The following notes describe the types of adapters that the server supports and other information that you must consider when installing an adapter: v Yo u can install only low-profile adapters in PCI slots 3 and 4 on the system board.
1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices and disconnect all power cords and external cables (see “T urning off the server” on page 12).
8. If you removed the PCI riser-card assembly to install the adapter , align the riser-card assembly with the release-tab posts, rear guides, and connector; then, press the PCI riser-card assembly firmly into the connector (see “Installing the riser-card assembly” on page 34).
If you have other optional devices to install or remove, do so now . Otherwise, go to “Completing the installation” on page 74. Removing an adapter To remove an adapter , complete the following steps.
5. If the adapter is on the riser card, remove the riser-card assembly from the server (see “Removing the riser-card assembly” on page 32). 1 Access holes 2 Release tabs 6. Disconnect any cables from the adapter . 7. Carefully grasp the adapter by its top edge or upper corners, and pull the adapter from the PCI slot.
Replacing the RAID SAS controller A ServeRAID SAS controller can be installed only in a dedicated slot on the system board. The server comes with a ServeRAID-8k-l SAS Controller installed. Note: The ServeRAID-8k-l SAS Controller does not have a battery .
1 RAID controller 4 Battery mounting tabs 2 Battery cable 5 Battery mounting clips 3 Battery 6 Battery cable connector 9. T urn the new ServeRAID-8k SAS controller so that the keys on the bottom edge align correctly with the connector .
the battery . This might take a few minutes, after which the startup process continues. This is a one-time occurrence. Important: Yo u must allow the initialization process to be completed. If you do not, the battery will not work, and the server might not start.
2.5-inch drives To install a drive in a hot-swap bay , complete the following steps. Attention: To maintain proper system cooling, do not operate the server for more than 10 minutes without either a drive or a filler panel installed in each bay . 1. Read the safety information that begins on page v and “Installation guidelines” on page 29.
Removing a hard disk drive 3.5-inch drives 1 T ray handle 2 Hard disk drive Chapter 2. Installing optional devices 49.
2.5-inch drives To remove a hot-swap hard disk drive, complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. Move the tray handle on the drive to the open position (perpendicular to the drive).
To install a tape drive in a 3.5-inch model server , complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices, and disconnect the power cords and all external cables.
1 S ATA tape cable connector 2 S ATA tape cable 12. Install the fan-bracket assembly (see “Installing the fan-bracket assembly” on page 72). If you have other optional devices to install or remove, do so now . Otherwise, go to “Completing the installation” on page 74.
Installing a S ATA tape drive in a 2.5-inch model server To install a tape drive in a 2.5-inch model server , complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices, and disconnect the power cords and all external cables.
1 S ATA tape cable connector 2 S ATA tape cable 12. Install the fan-bracket assembly (see “Installing the fan-bracket assembly” on page 72). If you have other optional devices to install or remove, do so now . Otherwise, go to “Completing the installation” on page 74.
Important: Dual-core and quad-core microprocessors are not interchangeable and cannot be used in the same server . For example, if the server has a dual-core microprocessor , you cannot install a quad-core microprocessor as the second microprocessor .
Note: For simplicity , certain components are not shown in this illustration. 1 Heat sink 2 Heat-sink filler 3 Microprocessor 4 Microprocessor-socket dust cover Attention: v A startup (boot) microprocessor must always be installed in microprocessor connector 1 on the system board.
4. Remove the microprocessor air baf fle (see “Removing the microprocessor air baffle” on page 34). 5. Install the VRM in the VRM connector . a. T ouch the static-protective package containing the VRM to any unpainted metal surface on the outside of the server .
c. Rotate the microprocessor release lever 2 on the socket from its closed and locked position until it stops in the fully open position. Attention: v Do not touch the microprocessor contacts; handle the microprocessor by the edges only .
Attention: Do not touch the thermal grease 1 on the bottom of the heat sink 2 or set down the heat sink after you remove the plastic cover . T ouching the thermal grease will contaminate it. a. Make sure that the heat-sink release lever is in the open position.
Installing a memory module The following notes describe the types of dual inline memory modules (DIMMs) that the server supports and other information that you must consider when installing DIMMs: v The server supports up to 12 Fully Buf fered DIMM PC2-5300 512 MB, 1 GB, 2 GB, and 4 GB DIMMs, for a maximum of 48 GB of system memory .
DIMM 1 DIMM 2 DIMM 3 DIMM 4 DIMM 5 DIMM 6 DIMM 7 DIMM 8 DIMM 9 Channel 0 Channel 1 Channel 2 DIMM 10 DIMM 11 DIMM 12 Channel 3 Branch 1 Branch 0 v Each DIMM in a pair must be the same size, speed, type, and technology to ensure that the server will operate correctly .
To install a DIMM, complete the following steps. 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices, and disconnect the power cord and all external cables.
When you use memory mirroring, you must install two pairs of DIMMs at a time. The four DIMMs in each group must be identical. See T able 4 for the DIMM connectors that are in each group. T able 4. Memory mirroring DIMM installation sequence Group DIMM connectors 1 1, 4, 7, and 10 2 2, 5, 8, and 11 3 3, 6, 9, and 12 T able 5.
In the configuration that you use, install the largest DIMMs first. T able 6. Online-spare DIMM configurations, basic scheme Number of DIMMs DIMM connectors Results 4 1 and 4 (largest DIMMs) 2 and 5 O.
Removing a memory module To remove a DIMM, complete the following steps. 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices, and disconnect the power cord and all external cables.
Installed power supplies Required Power supply 1 Fans in locations 3, 4, 8, 9, and 10 Power supplies 1 and 2 All 10 fans Statement 8: CAUTION: Never remove the cover on a power supply or any part that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached.
Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply and to install and remove a dc power supply . See the documentation that comes with each dc power supply for installation instructions.
Removing a hot-swap power supply Attention: The information in this document regarding installing and removing power supplies and connecting and disconnecting power refers to ac power supplies only . If the server contains dc power supplies, see the documentation that comes with the dc power supplies.
1 LED 2 Hot-swap fan To install any of the 10 replaceable fans, complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. If you have not done so already , slide the server out of the rack and remove the cover (see “Removing the cover” on page 31).
1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. Slide the server out of the rack and remove the cover (see “Removing the cover” on page 31).
1 Fan bracket 2 Lever 3 Fan-bracket release latches 4 Lever To remove the fan-bracket assembly , complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2.
Installing the fan-bracket assembly 1 Fan bracket 2 Lever 3 Fan-bracket release latches 4 Lever To install the fan-bracket assembly , complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29.
Replacing the CD-RW/DVD drive To remove the CD-RW/DVD drive, complete the following steps. 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices, and disconnect the power cords and all external cables.
Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply . See the documentation that comes with each dc power supply . 3. Remove the cover (see “Removing the cover” on page 31).
4. Install the server in a rack. See the Rack Installation Instructions that come with the server for complete rack installation and removal instructions.
Rear view 1 Power cord connector 7 USB 2 connector 2 Systems-management Ethernet connector 8 USB 1 connector 3 Ethernet 1 connector 9 Video connector 4 USB 4 .
If you have installed or removed a hard disk drive, see “Using the RAID Configuration Utility program” on page 87 for information about reconfiguring the disk arrays.
78 ThinkServer RD120 T ypes 6444, 6445, 6446, and 6447: User Guide.
Chapter 3. Configuring the server The following configuration programs and capabilities come with the server: v Configuration/Setup Utility program The Configuration/Setup Utility program is part of the basic input/output system (BIOS).
v Set and change the startup characteristics of the server and the order of startup devices (startup-drive sequence) v Set and change settings for advanced hardware features v V iew and clear the erro.
v Date and T ime Select this choice to set the date and time in the server , in 24-hour format ( hour : minute : second ). This choice is on the full Configuration/Setup Utility menu only . v System Security Select this choice to set passwords. See “Passwords” on page 84 for more information.
– CPU Options Select this choice to specify the system cache type, and to enable or disable hyper-threading, the pre-fetch queue, and Virtualization T echnology for all microprocessors in the server . Virtualization T echnology enables the microprocessor to appear to be a dedicated processor to each running application in the system.
- BMC Build Level This is a nonselectable menu item that displays the BMC firmware build level. - BMC Build Date This is a nonselectable menu item that displays the BMC firmware build date. - BMC POST W atchdog Enable or disable the BMC POST watchdog.
more information about error codes that occur . See the Hardware Maintenance Manual on the ThinkServer Documentation DVD for instructions for running the diagnostic programs. v Save Settings Select this choice to save the changes that you have made in the settings.
v If an administrator password is set, type the administrator password at the password prompt (see “Administrator password”). Start the Configuration/Setup Utility program and reset the power-on password. v Remove the battery from the server and then reinstall it.
1 Boot block recovery jumper (J42) 2 Switch block (SW2) To clear CMOS and reset the passwords, complete the following steps: 1. Read the safety information that begins on page v and “Installation guidelines” on page 29. 2. T urn off the server and peripheral devices and disconnect all power cords and external cables.
Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply and to install and remove a dc power supply . See the documentation that comes with each dc power supply .
RAID Configuration Utility menu choices The following choices are on the IBM ServeRAID Configuration Utility menu: v Array Configuration Utility Select this choice to create, manage, or delete arrays, or to initialize drives.
Using the baseboard management controller utility programs Use the baseboard management controller utility programs to configure the baseboard management controller , download firmware updates and sensor data record/field replaceable unit (SDR/FRU) updates, and remotely manage a network.
90 ThinkServer RD120 T ypes 6444, 6445, 6446, and 6447: User Guide.
Appendix. Notices Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area.
estimated through extrapolation. Actual results may vary . Users of this document should verify the applicable data for their specific environment. T rademarks The following terms are trademarks of Le.
Maximum internal hard disk drive capacities assume the replacement of any standard hard disk drives and population of all hard disk drive bays with the largest currently supported drives that are available from Lenovo. Maximum memory might require replacement of the standard memory with an optional memory module.
Remarque : Cette marque s’applique uniquement aux pays de l’Union Européenne et à la Norvège. L ’etiquette du système respecte la Directive européenne 2002/96/EC en matière de Déchets des.
Battery return program This product may contain a lithium or lithium ion battery . Consult your user manual or service manual for specific battery information. The battery must be recycled or disposed of properly . Recycling facilities may not be available in your area.
unsorted municipal waste, but use the collection framework available to customers for the return, recycling, and treatment of batteries and accumulators. Customer participation is important to minimize any potential effects of batteries and accumulators on the environment and human health due to the potential presence of hazardous substances.
A vis de conformité à la réglementation d’Industrie Canada Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada. Australia and New Zealand Class A statement Attention: This is a Class A product.
Chinese Class A warning statement Japanese V oluntary Control Council for Interference (VCCI) statement Lenovo product service information for T aiwan 98 ThinkServer RD120 T ypes 6444, 6445, 6446, and.
Index A ac power LED 11 acoustical noise emissions 3, 4 adapter installing 39 PCI bus, identification 40 PCI Express bus 43 PCI-X bus 43 removing 43 requirements 40 slot types 40 specifications 3 admi.
expansion slots 4 external cabling 75 connectors 75 F fan installing 68 replacing 68, 69 requirements 68 FCC Class A notice 96 features and specifications 3 RAS 7 server 3 filler panel hard-disk drive.
port connectors 21 power supply installing 65 operating requirements 65 specifications 4 power-control button 9 power-control-button shield 9 power-cord connector 11 power-on LED 11 rear 9 power-on pa.
video connector (continued) rear 11 voltage regulator module, installing 57 VRM See voltage regulator module W Web site Lenovo support 2, 29, 55 Lenovo ThinkServer RD120 products 1 weight 3, 4 102 Thi.
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Part Number: 46U0861 Printed in USA (1P) P/N: 46U0861.
An important point after buying a device Lenovo RD120 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lenovo RD120 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lenovo RD120 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lenovo RD120 you will learn all the available features of the product, as well as information on its operation. The information that you get Lenovo RD120 will certainly help you make a decision on the purchase.
If you already are a holder of Lenovo RD120, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lenovo RD120.
However, one of the most important roles played by the user manual is to help in solving problems with Lenovo RD120. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lenovo RD120 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
