User manual LENOVO H520S

[. . . ] Lenovo H520s Hardware Maintenance Manual ide aideaidea Centreidea Machine Types: 10093/2561/4746 Lenovo H520s Hardware Maintenance Manual Machine Types: 10093/2561/4746 Contents Chapter 1. . 21 27 27 28 28 29 30 32 33 34 35 37 37 38 39 41 42 43 45 Chapter 3. . Starting the Lenovo BIOS Setup Utility program Viewing and changing settings . . 53 53 © Copyright Lenovo 2012 iii iv Lenovo H520sHardware Maintenance Manual Chapter 1. [. . . ] Selecting or changing the startup device sequence 16 Lenovo H520sHardware Maintenance Manual To view or permanently change the configured startup device sequence, do the following: 1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on page 13). From the Lenovo BIOS Setup Utility program main menu, select the Startup option. Press the Enter key, and select the devices for the Primary Boot Sequence. Use the <×> key to exclude the device from or include the device in the boot sequence. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option. If you do not want to save the settings, select Discard changes and Exit from the menu. If you have changed these settings and want to return to the default settings, select Load Optimal Defaults from the menu. Exiting the Lenovo BIOS Setup Utility program After you finish viewing or changing settings, press the Esc key to return to the Lenovo BIOS 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 Lenovo BIOS Setup Utility program. • 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 Lenovo H520sHardware 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. • If you did not receive any error message look for a description of your error symptoms in the first part of this index. Hard disk drive boot error A hard disk drive boot error can have the following causes. Error The startup drive is not included in the boot sequence in configuration. FRU/Action Check the configuration and ensure the startup drive is in the boot sequence. Replace the hard disk drive. Power Supply Problems Follow these procedures if you suspect there is a power supply problem. Check/Verify Check that the following are properly installed: • Power Cord • On/Off Switch connector • System Board Power Supply connectors • Microprocessor(s) connection Check the power cord. [. . . ] Reattach the power supply, hard disk drive and optical drive. Step 13. Reattach the front bezel, computer cover. Replacing the motherboard Note: For this procedure, it helps to lay the computer flat. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. [. . . ]