Step 1:

Remove both power cords to power off the system.
Remove top cover screws and slide open the top cover.

Step 2:

CMOS battery is located near M.2 SSD and fans.

Use a small pin (e.g. paper clip) and follow the guide below to gently remove the CMOS coin battery from the holder.

After removing the CMOS battery, please wait ~ 15-20 seconds before putting back the battery.

Step 3:

After reinstalling the CMOS battery and the top cover back, power on the system and check/reset BIOS clock date/time in BIOS setup.

To go to BIOS setup, on the serial console, at bootup BIOS POST screen, press “DEL” key.

On the "Main" BIOS setup page, adjust the system date/time to current UTC date/time.

Go to "Save & Exit" page and select Save & Reset to reboot the system.

<DONE>