Lenovo 5106, 5114, 5150, 5110 manual Removing the computer cover

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2.Disconnect all cables, power cords, and external options from your computer. See “Locating connectors on the rear of your computer” on page 68.

3.Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up.

4.Use a screwdriver to remove the four screws. Keep the four screws, and put them aside. You will need them when installing the computer stand.

5. Remove the computer stand off the computer and put it in a safe place.

Removing the computer cover

CAUTION:

The microprocessor and heat sink assembly might be very hot. Turn off the computer and wait three to five minutes to let the computer cool before opening the computer cover.

This section provides instructions on how to remove the computer cover.

To remove the computer cover, do the following:

1.Turn off the computer.

2.Disconnect all cables, power cords, and external options from your computer. See “Locating connectors on the rear of your computer” on page 68.

3.Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up.

4.Remove the computer stand. See “Removing the computer stand” on page 73.

5.Use a screwdriver to loosen the two captive screws 1 near the bottom of the computer by turning them counterclockwise. You may hear the computer cover rattling when you turn the screwdriver.

Note: The two screws are captive; they are part of the computer cover and cannot be removed.

74ThinkCentre Hardware Maintenance Manual

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Contents ThinkCentre Hardware Maintenance Manual Page ThinkCentre Hardware Maintenance Manual Second Edition September Copyright Lenovo Contents Appendix A. Notices 117 Important Safety Information About this manualThinkCentre Hardware Maintenance Manual Electrical safety Safety informationGeneral safety ThinkCentre Hardware Maintenance Manual Safety inspection guide Handling electrostatic discharge-sensitive devicesSafety notices multi-lingual translations Grounding requirementsTo Connect To Disconnect ≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Safety information Perigo Cuidado Para Conectar Para DesconectarPerigo 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 Pericolo Per collegarsi Per scollegarsiPrestare attenzione nel sollevare lapparecchiatura ThinkCentre Hardware Maintenance Manual Peligro No debe Adopte procedimientos seguros al levantar el equipo ThinkCentre Hardware Maintenance Manual Specifications Accessing Lenovo programs on the Windows 7 operating systemGeneral information Lenovo programsProgram Icon name Program Control Panel section Green text in Control PanelAccessing Lenovo programs on the Windows 8 operating system Additional information resourcesThinkCentre Hardware Maintenance Manual Problem determination tips General CheckoutThinkCentre Hardware Maintenance Manual Symptom Action Troubleshooting and diagnosticsBasic troubleshooting Accessing Control Panel on the Windows 8 operating system Troubleshooting procedureTroubleshooting Sound comes from one external speaker only Audio problemsNo audio in Windows CD or DVD does not work CD problemsNo audio in DOS applications or games DVD problems Black screen instead of DVD videoDVD movie will not play No audio or intermittent audio while playing DVD movieIntermittent problems Keyboard, mouse, or pointing device problemsPlayback is very slow or choppy Invalid disc or no disc found messagePointer on the screen does not move smoothly with the mouse All or some keys on the keyboard do not workMouse or pointing device does not work Monitor problems Wireless keyboard does not workFingerprint reader does not work Wrong characters appear on the screenImage appears to be flickering Image is discoloredNetworking problems Ethernet problemsWireless LAN problem Adapter stops working for no apparent reasonBluetooth problems Option problemsWireless WAN problem Performance and lockup problems An option that was just installed does not workAn option that previously worked does not work now Insufficient free hard disk drive spaceExcessive number of fragmented files Click Start ComputerPrinter problems Serial port problemsSoftware problems Software does not work as expectedLenovo Solution Center USB problemsDiagnostics Troubleshooting and diagnostics ThinkCentre Hardware Maintenance Manual Using the Setup Utility program Starting the Setup Utility programViewing and changing settings Using passwordsPassword considerations Power-On PasswordAdministrator Password Hard Disk PasswordEnabling or disabling a device Selecting a startup deviceSelecting a temporary startup device Selecting or changing the startup device sequenceEnabling ErP compliance mode Exiting the Setup Utility program ThinkCentre Hardware Maintenance Manual Symptom-to-FRU Index Hard disk drive boot errorPower Supply Problems Beep symptomsPost error codes Beep Symptom FRU/ActionShort and 1 long beeps Dram memory error Error code Post Error Message Description/ActionDisplay/Monitor Miscellaneous error conditionsMessage/Symptom FRU/Action Message/Symptom FRU/Action Undetermined problems ThinkCentre Hardware Maintenance Manual Front connector, control, and indicator locations LocationsLocating connectors on the rear of your computer Rear connector locationsLocating major FRUs and CRUs Number FRU description Self-service CRU Optional-service CRU Looking up FRU informationLocations of the parts and connectors on the system board Locating parts on the system boardThinkCentre Hardware Maintenance Manual Removing the computer stand Adjusting the computer standReplacing FRUs Removing the computer cover Opening and closing the system board shielding Opening the system board shieldingClosing the system board shielding Replacing FRUs Removing the rear I/O shielding Installing the rear I/O shieldingReplacing the rear I/O shielding Replacing the hard disk drive Removing the hard disk driveInstalling a hard disk drive Replacing the optical drive Installing an optical drive Removing the optical driveReplacing the memory module Installing a memory module Removing the memory moduleReplacing the microprocessor fan assembly Removing 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 Replacing the system board Removing the system boardInstalling a system board Removing the internal speakers Installing internal speakersReplacing the internal speakers Replacing the rear I/O assembly Removing the rear I/O assemblyInstalling a rear I/O assembly Replacing the inverter Removing the inverter Installing an inverter Replacing the battery Removing the batteryRemoving the power supply assembly Installing a batteryReplacing the power supply assembly ThinkCentre Hardware Maintenance Manual Installing a power supply assembly ThinkCentre Hardware Maintenance Manual Replacing the LCD panel Removing the LCD panelInstalling an LCD panel Replacing the Wifi card Removing the Wifi cardInstalling the Wifi card Installing a computer wall mount Completing the FRU installationInstalling a computer cover Installing a computer standReplacing FRUs ThinkCentre Hardware Maintenance Manual Additional Service Information Updating flashing the Bios from a disc Updating flashing the Bios from your operating system Recovering from a POST/BIOS update failureAutomatic Power-On features Power managementAutomatic configuration and power interface Acpi Bios Appendix A. Notices Television output notice European conformance CE mark TrademarksIndex 119Page Page Part Number 1P P/N
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