Lenovo 6431, Hardware Maintenance Manual

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2. Set your removable media device as the first startup device.
3. Select the removable media device that you want to boot from and move it to
the top of the list.
To recover the BIOS code, complete the following steps:
1. Read the safety information that begins on page vii and “Installation guidelines”
on page 57.
2. Turn off the server and all attached devices; then, disconnect all power cords
and external cables.
3. Unlock and remove the side cover (see “Removing the side cover” on page
62).
4. Locate the boot block recovery jumper (JP6) on the system board (see the
following illustration) and remove any adapters that impede access to the
jumper (see “Removing an adapter” on page 68).
Boot block
jumper (JP6)
Clear CMOS
jumper (JP1)
Mini-BMC
force update
jumper (JP3)
5. Move the boot block recovery jumper to pins 2 and 3.
6. Replace any adapters that you removed (see “Installing an adapter” on page
69); then, install the side cover (see “Installing the side cover” on page 63).
7. Reconnect all external cables and power cords.
8. Insert the update diskette, CD, or DVD into the diskette, CD, or DVD drive.
9. Turn on the server and the monitor.
After the update session is completed, remove the diskette, CD, or DVD from
the drive and turn off the server.
10. Disconnect all power cords and external cables.
11. Remove the side cover (see “Removing the side cover” on page 62).
Chapter 5. Diagnostics
233