Lenovo B41 30 B41 35 B51 30 And B51 35 Laptop User Guide
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25 Chapter 4. Troubleshooting Frequently asked questions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - This section lists frequently asked questions by category. „Finding information What safety precautions should I follow when using my computer? The Lenovo Safety and General Information Guide contains safety precautions for using your computer. Read and follow all the precautions when using your computer. Where can I find the hardware specifications for my computer? You can find hardware specification for your computer from the printed flyers which came with your computer. Where can I find warranty information? For the warranty applicable to your computer, including the warranty period and type of warranty service, see the Lenovo limited warranty flyer. „Drivers and preinstalled software Where are the installation discs for Lenovo preinstalled software (desktop software)? Your computer did not come with installation discs for Lenovo preinstalled software. If you need to reinstall preinstalled software, you can find the installation program on the D partition of your hard disk. If you cannot find the installation program there, download it from the Lenovo consumer support Web site. Where can I find drivers for the various hardware devices of my computer? If your computer is preinstalled with a Windows operating system, Lenovo provides drivers for the hardware devices that you need on the D partition of your hard disk. You can also download the latest device drivers from the Lenovo consumer support Web site.
26 Chapter 4. Troubleshooting „Lenovo OneKey Recovery system Where are the recovery discs? Your computer did not come with recovery discs. Use the recovery system if you need to restore the system to its factory status. What can I do if the back-up process fails? If you can start the backup but it fails during the back-up process, try the following steps: 1Close all open programs, and then restart the back-up process. 2Check to see if the destination media is damaged. Select another path and then try again. When do I need to restore the system to its factory status? Use this feature when the operating system fails to start up. If there is critical data on the system partition, back it up before starting recovery. „BIOS setup utility What is the BIOS setup utility? The BIOS setup utility is ROM-based software. It communicates basic computer information and provides options for setting boot devices, security, hardware mode, and other preferences. How can I start the BIOS setup utility? To start the BIOS setup utility: 1Shut down the computer. 2Press the Novo button and then select BIOS Setup. How can I change the boot priority? There are two boot priorities: UEFI First and Legacy First. To change the boot priority, start the BIOS setup utility and set Boot Priority to UEFI First or Legacy First in the Boot menu.
Chapter 4. Troubleshooting 27 When do I need to change the boot priority? The default boot priorities are UEFI First. If you need to install a legacy operating system (that is, an earlier version than that of your current operating system) on your computer, you will need to change the boot priority to Legacy First. The legacy operating system cannot be installed if you do not change the boot priority. „Getting help How can I contact the customer support center? See “Chapter 3. Getting help and service” of Lenovo Safety and General Information Guide.
28 Chapter 4. Troubleshooting Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Display problems When I turn on the computer, nothing appears on the screen. • If the screen is blank, make sure that: - The AC power adapter is connected to the computer, and the power cord is plugged into a working electrical outlet. - The computer power is on. Press the power button again for confirmation. - If you are using the AC power adapter or the battery, and the battery status indicator is on, press F12 ( ) to make the screen brighter. • If these items are set correctly, and the screen remains blank, have the computer serviced. When I turn on the computer, only a white cursor appears on a blank screen. • Restore backed-up files to your Windows environment or the entire contents of your hard disk to its original factory contents using the recovery system. If you still see only the cursor on the screen, have the computer serviced. My screen goes blank while the computer is on.• Your screen saver or power management might be enabled. Do one of the following to exit from the screen saver or to resume from sleep mode: -Touch the touchpad. - Press any key on the keyboard. - Press the power button. - Press F9 () to confirm whether the backlight for the LCD screen has been turned off. - If the problem persists, follow the solution in the next problem “The screen is unreadable or distorted.” The screen is unreadable or distorted.•Make sure that: - The display device driver is installed correctly. - The screen resolution and color quality are set correctly. - The monitor type is correct. Incorrect characters appear on the screen.• Are the operating system or programs installed correctly? If they are installed and configured correctly, have the computer serviced.
Chapter 4. Troubleshooting 29 BIOS password problems I forgot my password.• If you forget your user password, you must ask the system administrator to reset your user password. • If you forget your HDD password, a Lenovo authorized servicer cannot reset your password or recover data from the hard disk. You must take your computer to a Lenovo authorized servicer or a marketing representative to have the hard disk drive replaced. Proof of purchase is required, and a fee will be charged for parts and service. • If you forget your Supervisor password, a Lenovo authorized servicer cannot reset your password. You must take your computer to a Lenovo authorized servicer or a marketing representative to have the system board replaced. Proof of purchase is required, and a fee will be charged for parts and service. Sleep problems The critical low-battery error message appears, and the computer immediately turns off.• The battery power is getting low. Connect the AC power adapter to the computer, or replace the battery with a fully charged one. The computer enters sleep mode immediately after Power-on self-test (POST). • Make sure that: - The battery is charged. - The operating temperature is within the acceptable range. See “Chapter 2. Use and care Information” in the Lenovo Safety and General Information Guide. Note: If the battery is charged and the temperature is within an acceptable range, have the computer serviced. The computer does not return from sleep mode, and the computer does not work. • If your computer is in sleep mode, connect the AC power adapter to the computer and then press the Fn key or the power button. • If the system still does not return from sleep mode, stops responding, or cannot be turned off, reset the computer. Unsaved data may be lost. To reset the computer, press and hold the power button for 4 seconds or more.
30 Chapter 4. Troubleshooting Sound problems No sound can be heard from the speakers even when the volume is turned up.•Make sure that: - The mute function is off. - The combo audio jack is not used. - The speakers are selected as the playback device. Battery problems Your computer shuts down before the power and battery status indicator shows empty. -or- Your computer operates after the power and battery status indicator shows empty. • Reset the battery gauge using OneKey Optimizer. If the problem persists, replace with a new battery pack. The computer does not operate with a fully charged battery.• The surge protector in the battery might be active. Turn off the computer for one minute to reset the protector; then turn on the computer again. Hard disk drive problem The hard disk drive does not work.•In the Boot menu in the BIOS setup utility, make sure that the hard disk drive is included in the EFI list.
Chapter 4. Troubleshooting 31 Other problems Your computer does not respond.• To turn off your computer, press and hold the power button for 4 seconds or more. If the computer still does not respond, remove the battery pack and the AC power adapter. • Your computer might lock when it enters sleep mode during a communication operation. Disable the sleep timer when you are working on the network. The computer does not start from a device you want.• See the EFI list of the BIOS setup utility. Make sure that the BIOS setup utility is set so that the computer starts from the device you want. • Also make sure that the device from which the computer starts is enabled. Make sure that the device is included in the EFI list in the BIOS setup utility correctly. • Press F12 when the Lenovo logo appears on the screen while the computer is starting up to select the device you want the computer starts from. The connected external device does not work. • Do not connect or disconnect any external device cables other than USB while the computer power is on; otherwise, you might damage your computer. • When using a high power consumption external device such as an external USB optical disk drive, use an external device power adapter. Otherwise, the device might not be recognized, or system shut down might result.
32 Appendix A. CRU instructions Customer Replaceable Units (CRUs) are parts that can be upgraded or replaced by the customer. If a CRU is determined to be defective during the warranty period, a replacement CRU will be provided to the customer. Customers are responsible for installing the self-service CRUs for this product. Customers also can install optional-service CRUs, which might require some technical skills or tools, or request that a technician install the optional-service CRU under the terms of the applicable warranty service type for your country or region. Notes: The illustrations used in this chapter are of the Lenovo B51-30, unless otherwise stated. The illustrations in this manual might differ from the actual product. Please refer to the actual product. The CRU service is only applicable to certain countries.
Appendix A. CRU instructions 33 Replacing the battery pack - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - To replace the battery pack, do the following: 1Unlock the manual battery latch . While holding the spring-loaded battery latch in the unlocked position , remove the battery pack in the direction shown by the arrow . 2Install a fully charged battery pack. 3Slide the manual battery latch to the locked position. Note: Use only the battery provided by Lenovo. Any other batteries could ignite or explode.Make sure the computer is turned off and all the cables disconnected from the computer before you replace the battery pack. Make sure the computer display is closed to avoid being damaged. a b c 2 23 1 1
34 Appendix A. CRU instructions Replacing the hard disk drive - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - You can increase the storage capacity of your computer by replacing the hard disk drive with one of greater capacity. You can purchase a new hard disk drive from your reseller or Lenovo marketing representative. The hard disk drive is very sensitive. Incorrect handling can cause damage and permanent loss of data on the hard disk. Before removing the hard disk drive, make a backup copy of all the information on the hard disk, and then turn the computer off. Never remove the hard disk drive while the system is operating or in sleep mode. Notes: Replace the hard disk drive only for upgrading or repair. The connectors and bay of the hard disk drive were not designed for frequent changes or drive swapping. The preinstalled software are not included on an optional hard disk drive. Make sure the computer is turned off and all the cables disconnected from the computer before you replace the hard disk drive. Make sure the computer display is closed to avoid being damaged. Handling a hard disk drive • Do not drop the drive or subject it to physical shock. Put the drive on a material, such as soft cloth, that absorbs any physical shock. • Do not apply pressure to the cover of the drive. • Do not touch the connector of the drive.