In-Band Manual Recovery Method - Lenovo System x3650 M5 Installation And Service Manual

The flash memory of the server consists of a primary bank and a back up bank. You must maintain a
bootable UEFI firmware image in the back up bank. If the server firmware in the primary bank becomes
corrupted, you can either manually boot the back up bank with the UEFI boot backup jumper (J15), or in the
case of image corruption, this will occur automatically with the Automated Boot Recovery function.

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:
Note: The system board in your server might be slightly different from the illustration.
Step 1. Read the safety information that begins on "Safety" on page v and "Installation guidelines" on page
305.
Step 2. Turn off the server, and disconnect all power cords and external cables.
Step 3. Remove the cover (see "Removing the top cover" on page 162).
Step 4. Locate the UEFI boot backup jumper (J15) on the system board.
Figure 56. UEFI boot backup jumper (J15) location
Step 5. Move the UEFI boot backup jumper (J15) from pins 1 and 2 to pins 2 and 3 to enable the UEFI
recovery mode.
Step 6. Reinstall the server cover; then, reconnect all power cords.
Step 7. Restart the server. The system begins the power-on self-test (POST).
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Lenovo System x3650 M5 Installation and Service Guide