Lenovo ThinkStation S20, Hardware Manual

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2. Unplug all power cords from electrical outlets, and open the computer cover.
See “Removing the cover” on page 96.
3.
Access the system board.
4. Locate the Clear CMOS/Recovery jumper on the system board. See “Locating
parts on the system board” on page 137.
5. Remove any cables that impede access to the Clear CMOS/Recovery jumper.
6. Move the jumper from the standard position (pins 1 and 2) to pins 2 and 3.
7. Reinstall the adapter cards (some models).
8. Close the computer cover and reconnect any cables that were disconnected.
9. Reconnect the power cords for the computer and monitor to electrical outlets.
10.
Insert the POST/BIOS update (flash) diskette into drive A, and turn on the
computer and the monitor.
11. The recovery session will take two to three minutes. During this time you will
hear a series of beeps. After the update session is completed, there will be no
video, the series of beeps will end, and the system will automatically turn off.
Remove the diskette from the diskette drive.
12. Repeat steps 2 through 5.
13. Replace the Clear CMOS/Recovery jumper to its original position.
14. Reinstall the adapter cards (some models) if removed.
15. Close the computer cover and reconnect any cables that were disconnected.
16. Turn on the computer to restart the operating system.
Chapter 13. Additional Service Information
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