In-band manual recovery method

This section details the in-band manual recovery method.

To recover the server firmware and restore the server operation to the primary bank, complete the following steps:

1. Read the safety information that begins on Safety and Installation guidelines.
2. Turn off the server, and disconnect all power cords and external cables.
3. Unlock and remove the left-side cover (see Removing the left-side cover).
4. Locate SW4 on the system board.
5. Change the position of the UEFI boot backup switch (change switch 1 of the SW4 to the on position) to enable the UEFI recovery mode.
6. Reinstall the server cover; then, reconnect all power cords.
7. Restart the server. The system begins the power-on self-test (POST).
8. Boot the server to an operating system that is supported by the firmware update package that you downloaded.
9. Perform the firmware update by following the instructions that are in the firmware update package readme file.
10. Turn off the server and disconnect all power cords and external cables, and then remove the left-side cover (see Removing the left-side cover).
11. Change the position of the UEFI boot backup switch back (change switch 1 of the SW4 to the off position).
12. Reinstall the left-side cover (see Installing the left-side cover).
13. Reconnect the power cord and any cables that you removed.
14. Restart the server. The system begins the power-on self-test (POST). If this does not recover the primary bank, continue with the following steps.
15. Remove the left-side cover (see Removing the left-side cover).
16. Reset the CMOS by removing the system battery (see Removing the system battery).
17. Leave the system battery out of the server for approximately 5 to 15 minutes.
18. Reinstall the system battery (see Installing the system battery).
19. Reinstall the left-side cover (see Installing the left-side cover).
20. Reconnect the power cord and any cables that you removed.
21. Restart the server. The system begins the power-on self-test (POST).
22. If these recovery efforts fail, contact your Lenovo service representative for support.