User manual ASUS G73SW

[. . . ] . 83 84 © Copyright Lenovo 2011, 2012 i ii Hardware Maintenance Manual About this manual This manual contains service and reference information for the following Lenovo® products. Product Lenovo B470 Lenovo B470e Machine type (MT) 4315, 20087 3499, 20172 Use this manual to troubleshoot problems. The manual is divided into the following sections: · The common sections provide general information, guidelines, and safety information required for servicing computers. · The product-specific section includes service, reference, and product-specific parts information. Important: This manual is intended only for trained service technicians who are familiar with Lenovo products. Before servicing a Lenovo product, be sure to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 27. © Copyright Lenovo 2011, 2012 iii iv Hardware Maintenance Manual Chapter 1. [. . . ] Note: The recovery process might take up to 2 hours. Passwords As many as two passwords might be needed for a Lenovo notebook computer: the power-on password, the hard disk password, and the supervisor password. If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the computer is turned on. Note: If only a supervisor password is set, the password prompt will not be displayed when the operating system is started. Power-on password A power-on password (POP) protects the system from being powered on by an unauthorized person. The password must be entered before an operating system can be booted. © Copyright Lenovo 2011, 2012 33 Supervisor password A supervisor password (SVP) protects the system information stored in the BIOS. The user must enter the SVP in order to get access to the BIOS and change the system configuration. Attention: If the SVP has been forgotten and cannot be made available to the service technician, there is no service procedure to reset the password. The system board must be replaced for a scheduled fee. Power management Note: Power management modes are not supported for APM operating system. To reduce power consumption, the computer has three power management modes: screen blank, sleep, and hibernation. Screen blank mode If the time set on the "Turn off monitor" timer in the operating system expires, the LCD backlight turns off. To end screen blank mode and resume normal operation, press any key. Sleep mode When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank mode: · The LCD is powered off. In certain circumstances, the computer goes into sleep mode automatically: · If a "suspend time" has been set on the timer, and the user does not do any operation with the keyboard, the hard disk drive, the parallel connector, or the diskette drive within that time. · If the battery indicator blinks orange, indicating that the battery power is low. · Orange: The computer is operating on battery power with the remaining power between 5% and 20% of its capacity. · Blinking white: The battery is being charged with the remaining power between 20% and 80% of its capacity. · Off: The remaining power of the battery is more than 80% of its capacity, or the computer is operating on battery power with the remaining power between 20% and 80% of its capacity. 6 Wireless status · White: Any one of the wireless devices is enabled. Lenovo B470 and B470e 39 Fn key combinations The following table shows the function of each combination of Fn with a function key. Table 3. Function key combinations Key combination Fn+Esc Fn+F1 Fn+F2 Fn+F3 Fn+F4 Fn+F5 Fn+F6 Fn+F8 Fn+F9 Fn+F10 Fn+F11 Fn+F12 Fn+PrtSc Fn+Home Fn+End Fn+PgUp Fn+PgDn Fn + up/down arrow Fn + left/right arrow Description Turn on or turn off the integrated camera. Increase or decrease the sound volume. 40 Hardware Maintenance Manual Chapter 6. FRU replacement notices This chapter presents notices related to removing and replacing parts. External CRU statement to customers: Some problems with your product can be resolved with a replacement part you can install yourself, called a "Customer Replaceable Unit" or "CRU. " Some CRUs are designated as Self-service CRUs and others are designated as Optional-service CRUs. Installation of Self-service CRUs is your responsibility; you may request that Lenovo installs an Optional-service CRU according to the warranty service for your product. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You may find a list of CRUs in the publications that ship with your product or at http://www. lenovo. com/CRUs. [. . . ] 145000602 145000537 145000605 145000531 145000524 145000533 145000530 145000535 145000526 145000536 145000534 145000525 FRU no. Notices Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. [. . . ]