About the Power button LED states
The following table provides a description of each power state.
Table: Power button LED states
State | Power Mode | LED | Description |
|---|---|---|---|
Power - off | Non-ACPI | Off | The system power is off, and the BIOS has not initialized the chipset. |
Power - on | Non-ACPI | On | The system power is on and the green Power button LED is active. |
S0 | ACPI (Advanced Configuration and Power Interface) | Steady on | The system and the operating system are up and running. |
S1-S3 | ACPI | Slow blink | DC power is still on. The operating system has saved context and gone into a level of low-power state. |
S4 | ACPI | Off | Mechanical is off. The operating system has saved context to the hard disk |
S5 | ACPI | Off | Mechanical is off and the operating system has not saved any context to the hard disk drive. |