View UEFI BIOS Event log

Restart the computer. When the logo screen is displayed, press F1.
Select Main > BIOS Event log. Then, press Enter. The BIOS Event log interface is displayed.
Navigate the interface by pressing the following keys, and then see details by selecting each item.
- ↑↓: Move keyboard focus
- PgUp / PgDn: Scroll page
- Enter: Select
- F3: Exit

The following BIOS event logs might be listed on your screen depending on the UEFI BIOS activities. Each log consists of date, time, and a description of the event.

Power On event: this log shows Power On Self Test (POST) routine has started with power-on process. It includes power on reason, boot mode and shutdown reason.
Subcomponent Code Measurement event: this log shows subcomponent code measurement has worked. It includes validation result of each component.
System Preboot Authentication Event event: this log shows what credential was provided to gain preboot authentication. It includes installed password, password type, input device and authentication result.
BIOS Password Change event: this log shows changes of the UEFI BIOS passwords. It includes password type, event type and result.
Subcomponent Self-healing event: this log shows information about the subcomponent where the recovery event occurred. It includes event cause, recovered firmware version and result.
BIOS Setup Configuration Change event: this log shows changes of UEFI BIOS Setup configuration. It includes item name and value.
Device Change event: this log shows changes of devices. It includes event cause and event type.
System Boot event: this log shows which boot device was utilized to boot the system. It includes boot option, description and file path list.
System Tamper event: this log shows occurrence of system tamper events. It includes event cause and event type.
POST Error event: this log shows occurrence of errors during POST routine. It includes the error code.
Flash Update event: this log shows occurrence of flash update. It includes event cause, updated firmware version and result.
Set On-Premise event: this logs shows changes of on-premise boot setting. It includes on-premise setting value and change method.
Capsule Update event: this log shows occurrence of UEFI capsule firmware update. It includes event cause, updated firmware version and result.
Log Cleared event: this log shows clearing BIOS event log has executed. It includes event cause and result.
Shutdown / Reboot event: this log shows UEFI BIOS is successfully shut down or the system is rebooted. It includes event cause and event type.