Lenovo 5114, 5106, 5150, 5110 manual Safety information, General safety, Electrical safety

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Chapter 2. Safety information

This chapter contains the safety information that you need to be familiar with before servicing a computer.

General safety

Follow these rules to ensure general safety:

Observe good housekeeping in the area of the machines during and after maintenance.

When lifting any heavy object:

1.Ensure you can stand safely without slipping.

2.Distribute the weight of the object equally between your feet.

3.Use a slow lifting force. Never move suddenly or twist when you attempt to lift.

4.Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back.

Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too heavy for you.

Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.

Before you start the machine, ensure that other service representatives and the customer's personnel are not in a hazardous position.

Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the machine.

Keep your tool case away from walk areas so that other people will not trip over it.

Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it.

Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, approximately 8 centimeters (3 inches) from the end.

Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing. Remember: Metal objects are good electrical conductors.

Wear safety glasses when you are: hammering, drilling, soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes.

After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective.

Reinstall all covers correctly before returning the machine to the customer.

Electrical safety

CAUTION:

Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

Observe the following rules when working on electrical equipment.

© Copyright Lenovo 2012

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Contents ThinkCentre Hardware Maintenance Manual Page ThinkCentre Hardware Maintenance Manual Second Edition September Copyright Lenovo Contents Appendix A. Notices 117 About this manual Important Safety InformationThinkCentre Hardware Maintenance Manual Safety information General safetyElectrical safety ThinkCentre Hardware Maintenance Manual Handling electrostatic discharge-sensitive devices Safety inspection guideGrounding requirements Safety notices multi-lingual translationsTo Connect To Disconnect ≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Safety information Perigo Para Conectar Para Desconectar CuidadoPerigo Safety information ThinkCentre Hardware Maintenance Manual Safety information Connexion Déconnexion ≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Vorsicht Achtung ThinkCentre Hardware Maintenance Manual Safety information Per collegarsi Per scollegarsi PericoloPrestare attenzione nel sollevare lapparecchiatura ThinkCentre Hardware Maintenance Manual Peligro No debe Adopte procedimientos seguros al levantar el equipo ThinkCentre Hardware Maintenance Manual Accessing Lenovo programs on the Windows 7 operating system SpecificationsGeneral information Lenovo programsProgram Control Panel section Green text in Control Panel Program Icon nameAdditional information resources Accessing Lenovo programs on the Windows 8 operating systemThinkCentre Hardware Maintenance Manual General Checkout Problem determination tipsThinkCentre Hardware Maintenance Manual Troubleshooting and diagnostics Basic troubleshootingSymptom Action Troubleshooting procedure Accessing Control Panel on the Windows 8 operating systemTroubleshooting Audio problems No audio in WindowsSound comes from one external speaker only CD problems No audio in DOS applications or gamesCD or DVD does not work Black screen instead of DVD video DVD problemsDVD movie will not play No audio or intermittent audio while playing DVD movieKeyboard, mouse, or pointing device problems Intermittent problemsPlayback is very slow or choppy Invalid disc or no disc found messageAll or some keys on the keyboard do not work Mouse or pointing device does not workPointer on the screen does not move smoothly with the mouse Wireless keyboard does not work Monitor problemsFingerprint reader does not work Wrong characters appear on the screenImage is discolored Image appears to be flickeringEthernet problems Networking problemsAdapter stops working for no apparent reason Wireless LAN problemOption problems Wireless WAN problemBluetooth problems An option that was just installed does not work Performance and lockup problemsAn option that previously worked does not work now Insufficient free hard disk drive spaceClick Start Computer Excessive number of fragmented filesSerial port problems Printer problemsSoftware does not work as expected Software problemsUSB problems DiagnosticsLenovo Solution Center Troubleshooting and diagnostics ThinkCentre Hardware Maintenance Manual Starting the Setup Utility program Using the Setup Utility programViewing and changing settings Using passwordsPower-On Password Password considerationsAdministrator Password Hard Disk PasswordSelecting a startup device Enabling or disabling a deviceSelecting a temporary startup device Selecting or changing the startup device sequenceEnabling ErP compliance mode Exiting the Setup Utility program ThinkCentre Hardware Maintenance Manual Hard disk drive boot error Symptom-to-FRU IndexPower Supply Problems Beep symptomsBeep Symptom FRU/Action Post error codesShort and 1 long beeps Dram memory error Error code Post Error Message Description/ActionMiscellaneous error conditions Message/Symptom FRU/ActionDisplay/Monitor Message/Symptom FRU/Action Undetermined problems ThinkCentre Hardware Maintenance Manual Locations Front connector, control, and indicator locationsRear connector locations Locating connectors on the rear of your computerLocating major FRUs and CRUs Looking up FRU information Number FRU description Self-service CRU Optional-service CRULocating parts on the system board Locations of the parts and connectors on the system boardThinkCentre Hardware Maintenance Manual Adjusting the computer stand Replacing FRUsRemoving the computer stand Removing the computer cover Opening the system board shielding Opening and closing the system board shieldingClosing the system board shielding Replacing FRUs Installing the rear I/O shielding Replacing the rear I/O shieldingRemoving the rear I/O shielding Removing the hard disk drive Replacing the hard disk driveInstalling a hard disk drive Replacing the optical drive Removing the optical drive Installing an optical driveReplacing the memory module Removing the memory module Installing a memory moduleRemoving the microprocessor fan assembly Replacing the microprocessor fan assemblyThinkCentre Hardware Maintenance Manual Installing a microprocessor fan assembly Replacing the microprocessor and heat sink assembly Removing the microprocessor and heat sink assembly Installing the microprocessor and heat sink assembly Replacing FRUs Removing the system board Replacing the system boardInstalling a system board Installing internal speakers Replacing the internal speakersRemoving the internal speakers Removing the rear I/O assembly Replacing the rear I/O assemblyInstalling a rear I/O assembly Replacing the inverter Removing the inverter Installing an inverter Removing the battery Replacing the batteryInstalling a battery Replacing the power supply assemblyRemoving the power supply assembly ThinkCentre Hardware Maintenance Manual Installing a power supply assembly ThinkCentre Hardware Maintenance Manual Removing the LCD panel Replacing the LCD panelInstalling an LCD panel Removing the Wifi card Replacing the Wifi cardInstalling the Wifi card Completing the FRU installation Installing a computer wall mountInstalling a computer stand Installing a computer coverReplacing FRUs ThinkCentre Hardware Maintenance Manual Additional Service Information Updating flashing the Bios from a disc Recovering from a POST/BIOS update failure Updating flashing the Bios from your operating systemPower management Automatic configuration and power interface Acpi BiosAutomatic Power-On features Appendix A. Notices European conformance CE mark Trademarks Television output notice119 IndexPage Page Part Number 1P P/N
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