Lenovo S710 manual Monitor problems, Wireless keyboard does not work

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Using or touching the reader with a dirty finger.

The surface of your finger is very different from when you enrolled your fingerprint.

The wireless keyboard does not work

Symptom: The wireless keyboard does not work.

Action: If the Transceiver Communications LED is on and the wireless Keyboard does not work, restart your computer. If restarting your computer does not solve the problem, verify that the following conditions are met:

The batteries are properly installed.

The batteries still retain their current.

The wireless keyboard is located less than ten meters away from the transceiver.

The transceiver is fully installed.

Action: If the transceiver communications LED is not on, reconnect the transceiver and the keyboard.

Monitor problems

Note: Many monitors have status-indicator lights and built-in controls for adjusting brightness, contrast, width, height, and other picture adjustments. However, the controls vary from monitor type to monitor type.

Select your symptom from the following list:

“Wrong characters appear on the screen” on page 41

“The monitor works when you turn on the computer, but goes blank after some period of computer inactivity” on page 41

“The monitor works when you turn on the computer, but goes blank when you start some application programs” on page 41

“The image appears to be flickering” on page 42

“The image is discolored” on page 42

Wrong characters appear on the screen

Symptom: Wrong characters appear on the screen.

Action: Have the computer serviced. For details, see “Lenovo Support Web site” on page 29.

The monitor works when you turn on the computer, but goes blank after some period of computer inactivity

Symptom: The monitor works when you turn on the computer, but goes blank after some period of computer inactivity.

Action: The computer is probably set for energy savings with the power-management feature. If the power-management feature is enabled, disabling it or changing the settings might solve the problem.

If these actions do not correct the problem, and you need technical assistance, see “Lenovo Support Web site” on page 29.

The monitor works when you turn on the computer, but goes blank when you start some application programs

Symptom: The monitor works when you turn on the computer, but goes blank when you start some application programs.

Chapter 5. Troubleshooting and diagnostics 41

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Contents Lenovo S710 All-In-One Hardware Maintenance Manual Page Lenovo S710 All-In-One Hardware Maintenance Manual First Edition August Copyright Lenovo Contents Appendix A. Notices About this manual Important Safety InformationLenovo S710 All-In-OneHardware Maintenance Manual Electrical safety Safety informationGeneral safety Lenovo S710 All-In-OneHardware 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 Lenovo S710 All-In-OneHardware Maintenance Manual Safety information Connexion Déconnexion ≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Vorsicht Arbeitsschutzrichtlinien beim Anheben der Maschine beachten AchtungLenovo S710 All-In-OneHardware Maintenance Manual Safety information Per collegarsi Per scollegarsi PericoloPrestare attenzione nel sollevare lapparecchiatura Lenovo S710 All-In-OneHardware Maintenance Manual Peligro No debe Adopte procedimientos seguros al levantar el equipo Lenovo S710 All-In-OneHardware Maintenance Manual Lenovo Support Web site SpecificationsGeneral information Lenovo S710 All-In-OneHardware Maintenance Manual General Checkout Problem determination tipsLenovo S710 All-In-OneHardware Maintenance Manual Symptom Action Troubleshooting and diagnosticsBasic troubleshooting Click Settings Click Control Panel Accessing Control Panel on the Windows 8 operating systemTroubleshooting procedure Audio problems TroubleshootingNo audio in DOS applications or games No audio in WindowsSound comes from one external speaker only CD or DVD does not work CD problemsNo audio or intermittent audio while playing DVD movie DVD problemsBlack screen instead of DVD video DVD movie will not playAll or some keys on the keyboard do not work Intermittent problemsKeyboard, mouse, or pointing device problems Invalid disc or no disc found messageClick Hardware and Sound Click Devices and Printers Mouse or pointing device does not workPointer on the screen does not move smoothly with the mouse Fingerprint reader does not workWrong characters appear on the screen Monitor problemsWireless keyboard does not work Image is discolored Image appears to be flickeringClick Start Control Panel Click Hardware and Sound Networking problemsEthernet problems Your computer cannot connect to the networkAdapter stops working for no apparent reason Wireless LAN problemWake on LAN feature is not working Sound does not come from the Bluetooth headphone Option problemsWireless WAN problem Bluetooth problemsInsufficient free hard disk drive space Performance and lockup problemsAn option that was just installed does not work An option that previously worked does not work nowPrograms and Features area, click the Clean up button Click Disk CleanupClick Programs Click Turn Windows features on or off Click Disk Cleanup Click Clean up system filesClick Optimize Printer problemsSerial port problems Click Defragment Now, then click ContinueSoftware does not work as expected Software problemsUSB problems Using passwords Using the Setup Utility programStarting the Setup Utility program Viewing and changing settingsEnabling or disabling a device Power-On PasswordAdministrator Password Setting, changing, and deleting a passwordSelecting or changing the startup device sequence Selecting a startup deviceSelecting a temporary startup device Exiting the Setup Utility program Beep symptoms Symptom-to-FRU IndexHard disk drive boot error Power Supply ProblemsError code Post Error Message Description/Action Post error codesBeep Symptom FRU/Action Short and 1 long beeps Dram memory errorDisplay/Monitor Miscellaneous error conditionsMessage/Symptom FRU/Action Second device hard disk First device networkUndetermined problems Lenovo S710 All-In-OneHardware Maintenance Manual Locations Front connector, control, and indicator locationsRear connector locations Locating major FRUs and CRUs Locating 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 boardReplacing FRUs Removing and reinstalling the system stand hinge coverRemoving the system stand hinge cover Removing and reinstalling the system standRemoving the system stand Lenovo S710 All-In-OneHardware Maintenance Manual Removing the computer cover Removing and reinstalling the Vesa mount bracketRemoving the Vesa mount bracket Replacing the hard disk driveRemoving the hard disk drive Removing the hard disk drive from the bracket Replacing the optical driveRemoving the optical drive Connecting the cable and installing the screw Removing and reinstalling the system board shieldRemoving the system board shield Replacing the microprocessor fanRemoving the microprocessor fan Replacing the heat sink assemblySafety, Warranty, and Setup Guide, go to Replacing the microprocessor Opening the retainer to access the microprocessor Removing the microprocessor Removing the battery Replacing the batteryReplacing the inverter Installing a new batteryRemoving the screws that secure the inverter Installing or replacing a memory moduleRemoving a memory module Removing the internal speakers Replacing the internal speakersRemoving the integrated camera Replacing the integrated cameraReplacing the system board Lenovo S710 All-In-OneHardware Maintenance Manual Replacing the LCD panel Disconnect the LCD panel cable from the system board Removing the four screws that secure the LCD panel Reconnect the LCD panel cable to the system board Replacing the Wi-Fi cardRemoving the screw that secures the Wi-Fi card Replacing the USB keyboard or mouse Completing the parts replacementInstalling the computer cover Lenovo S710 All-In-OneHardware Maintenance Manual CRU ID FRU lists-S710WD XL1000S WD10EZEX-08RKKA0 1TB HDD-LH PIB65F/TAHOE Rear IO-1 China DIP +BKT Foot Holder Pcak W/RUBBER Additional Service Information Updating flashing the Bios from your operating system Click Downloads and drivers Recovering from a POST/BIOS update failurePower management Automatic Power-on features Automatic configuration and power interface Acpi Bios107 Appendix A. NoticesEuropean conformance CE mark Trademarks Television output notice109 IndexPOST/BIOS update failure