Detect Memory Retraining (For Intel Models Only); Set The System Date And Time; Recover The Uefi Bios; Update Uefi Bios - Lenovo ThinkPad S2 Yoga Gen 8 User Manual

To change the startup sequence temporarily:
1. Restart the computer. When the logo screen is displayed, press F12.
2. Select the device that you want the computer to start from and press Enter.

Detect memory retraining (for Intel models only)

Memory retraining is a process to initialize the memory module and run diagnostic tests for the memory
module in your computer. The memory retraining might occur during POST if any of the following situations is
detected:
• Memory module replacement
• Total Memory Encryption setting change in UEFI BIOS
• UEFI BIOS update (Memory Reference Code [MRC] change)
When memory retraining occurs, the screen might be blank. You might see the LED indicators on Esc, F1,
and F4 blinking sequentially to indicate the progress. Do not press the power button to interrupt the process.
Wait a few minutes until the logo screen is displayed.

Set the system date and time

1. Restart the computer. When the logo screen is displayed, press F1.
2. Select Date/Time and set the system date and time as desired.
3. Press F10 to save changes and exit.

Recover the UEFI BIOS

If the UEFI BIOS is corrupted or maliciously attacked, it can self-recover and restore your computer from the
last uncorrupted and secure backup. This function protects your computer data.
During the UEFI BIOS self-recovery, the screen might be blank. You can check the progress based on
blinking modes of the LED indicators on Esc, F1, and F4. For details, refer to the following table.
Note: Do not press the power button to interrupt the progress. Wait a few minutes until the logo screen is
displayed.
Blinking modes
LED indicator on Esc blinks
LED indicator on F1 blinks
LED indicator on F4 blinks
LED indicators on Esc, F1 and F4 blink simultaneously

Update UEFI BIOS

When you install a new program, device driver, or hardware component, you might need to update UEFI
BIOS.
Download and install the latest UEFI BIOS update package by one of the following methods:
• Use the fwupdmgr or software utility to check LVFS for firmware updates.
• Go to
https://pcsupport.lenovo.com
instructions to download and install the latest UEFI BIOS update package.
28
ThinkPad L13 Gen 4, ThinkPad L13 Yoga Gen 4, ThinkPad S2 Gen 8, and ThinkPad S2 Yoga Gen 8 User Guide
Self-recovery progress
0% to 30%
30% to 45%
45% to 75%
75% to 100%
and select the entry for your computer. Then, follow the on-screen