Lenovo ThinkCentre M57 Hardware Maintenance Manual - Page 500
Updating, flashing, CD-ROM, diskette, Recovering, POST/BIOS, update, failure
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Updating (flashing) BIOS from a CD-ROM or diskette This section describes how to update (flash) the BIOS using a CD-ROM or diskette. system program updates are available at http://www.lenovo.com/support on the World Wide Web. 1. To update (flash) the BIOS: v If using a CD-ROM, make sure the computer is turned on. Insert the system program update (flash) CD-ROM into the optical drive. The update begins. v If using a diskette, make sure the computer is turned off. Insert the system program update (flash) diskette and turn on the computer. The update begins. 2. When you are prompted to select a language, press the number on your keyboard that corresponds to the language and then press Enter. 3. When prompted to change the serial number, press Y. 4. Type the seven-character serial number of your computer and then press Enter. 5. When prompted to change the machine type/model, press Y. 6. Type the seven-character machine type/model of your computer and then press Enter. 7. Follow the instructions on the screen to complete the update. Recovering from a POST/BIOS update failure Attention: If an interruption occurs during a POST/BIOS update (flash update), the computer might not restart correctly. If this occurs, perform the following procedure (also known as a Boot-block recovery). Note: If your computer has no internal diskette drive, an optional USB diskette drive must be connected to use the BIOS flash diskette. 1. Turn the computer off and insert the special recovery BIOS flash diskette in the diskette drive. 2. Turn the computer on. 3. The recovery session takes two to three minutes. During this time you will hear a series of beeps. After the update session completes, the series of beeps ends and the computer automatically turns off. There is no video during the recovery session. 4. Remove the special recovery BIOS flash diskette from the diskette drive. 494 Hardware Maintenance Manual