Lenovo ThinkPad T420si (English) User Guide - Page 182
Power On with AC Attach, Enabled, Disabled, Beep and Alarm, Serial ATA SATA
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Table 5. Config menu items (continued) PCI Express Power Management • Disabled • Enabled Power On with AC Attach • Disabled • Enabled Beep and Alarm Power Control Beep • Disabled • Enabled Low Battery Alarm Password Beep • Disabled • Enabled • Disabled • Enabled Serial ATA (SATA) Keyboard Beep SATA Controller Mode Option • Enabled • Disabled • Compatibility • AHCI • RAID 166 User Guide Normally, it is not necessary to change the setting. Enable or disable a feature that automatically adjusts power management when there is no PCI Express activity. Normally, it is not necessary to change the setting. Enable or disable a feature that powers on the system when AC is attached. If you select "Enabled", the system is powered on when AC is attached. When the system is in hibernate state, the system resumes. If you select "Disabled", the system is not powered on nor resumed when AC is attached. If this function is enabled, a beep sounds when the computer enters a power management mode, when it resumes operational mode, and when the ac power adapter is connected or disconnected. Enable or disable the low battery alarm. Enable this option to have a beep sound when the system is waiting for a power-on, hard disk, or supervisor password. Different beeps will be sounded when the entered password matches or does not match the configured password. Enable or disable keyboard beep when unmanageable key combinations are pressed. Select SATA controller operation mode. If your system supports RAID, select "RAID." If you select "Compatibility mode", serial SATA controller operates in compatibility mode.