User manual LENOVO IDEACENTRE B540P HARDWARE MAINTENANCE MANUAL

[. . . ] It is intended only for trained servicers who are familiar with Lenovo computer products. Before servicing a Lenovo product, be sure to read the Safety Information. The description of the TV card in this manual is only used for the machines which have the TV card. It is invalid for those machines which do not have TV card. Important Safety Information Be sure to read all caution and danger statements in this book before performing any of the instructions. [. . . ] From the Security menu, select Set Administrator Password and press the Enter key. Re-type the password to confirm the new password, if you type the new password correctly, the new password will be installed. To delete a previously set Administrator Password, do the following : 1. From the Security menu, select Set Administrator Password and press the Enter key. To delete an Administrator Password, Enter blank fields for each new password line term. Power-On Password When a Power-On Password is set, you cannot start the Setup Utility program until a valid password is typed from the keyboard. Setting, changing, or deleting a Power-On Password Note: A password can be any combination of letters and numbers up to 16 character (a-z, and 0-9). To set a Power-On Password, do the following: 14 IdeaCentre Q180Hardware Maintenance Manual 1. Start the Setup Utility program (See "Starting the Setup Utility program" on page 13. ) 2. From the Security menu, select Set Power-On Password and press the Enter key. Re-type the password to confirm, if you type the password correctly, the password will be installed. Start the Setup Utility program (See "Starting the Setup Utility program" on page 13. ) 2. If you have changed these settings and want to return to the default settings, select Load Optimal Defaults from the menu. Exiting the Setup Utility program After you finish viewing or changing settings, press the Esc key to return to the Setup Utility program main menu. Do one of the following: · If you want to save the new settings, select Save changes and Exit from the menu. When the Save & reset window shows, select the Yes button, and then press the Enter key to exit the Setup Utility program. 16 IdeaCentre Q180Hardware Maintenance Manual · If you do not want to save the settings, select Discard changes and Exit from the menu. When the Reset Without Saving window shows, select the Yes button, and then press the Enter key to exit the Setup Utility program. Chapter 5. Using the Setup Utility 17 18 IdeaCentre Q180Hardware Maintenance Manual Chapter 6. Symptom-to-FRU Index The Symptom-to-FRU index lists error symptoms and possible causes. Always begin with Chapter 4, "General Checkout, " on page 11. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to "Undetermined problems" on page 20. Notes: · If you have both an error message and an incorrect audio response, diagnose the error message first. · If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did receive a POST error message, diagnose the POST error message first. [. . . ] Reattach the computer cover. Replacing the motherboard Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage. Remove any media (disks, CDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. [. . . ]