Lenovo ThinkCentre M57 Hardware Maintenance Manual - Page 448

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. Remove power from the system and open the cover. 2. Remove any parts necessary to gain access to the Clear CMOS/Recovery jumper. 3. Move the Clear CMOS/Recovery jumper from the standard position (pins 1 and 2) to pins 2 and 3. 4. Insert the BIOS flash diskette in the diskette drive. 5. Close the cover and reconnect the computer power cord to the computer and to an electrical outlet. Turn on the computer. 6. The recovery session takes two to three minutes and starts with two short beeps. Video will be displayed after a short period, indicating that the recovery process has started. 7. When the flash recovery completes and the computer turns off, unplug the computer and open the cover. 8. Move the Clear CMOS/Recovery jumper back to the original position (pins 1 and 2). 9. Remove the BIOS flash diskette from the diskette drive. 10. Close or install the cover and reconnect all external cables. 11. Plug in computer and power on. 442 Hardware Maintenance Manual