Power management, Sleep mode, Hibernation mode | Lenovo 33472YU

5.Select Hard-diskx password, where x is the letter of the hard disk drive. A pop-up window opens.

6.Select Master HDP.

7.Type the current master hard-disk password in the Enter Current Password field. Then leave the Enter New Password field blank, and press Enter twice.

8.Press Fn+F10 to save changes and exit the ThinkPad Setup program.

9.Select Yes in the Setup Notice window. Both the user hard-disk password and master hard-disk password will be removed.

Power management

There are several power-saving modes, such as sleep mode, hibernation mode, and wireless off mode. These power-saving modes enable the users to conserve power at any time.

Sleep mode

When the computer enters sleep mode, the following events occur:

•The LCD is powered off.

•The hard disk drive is powered off.

•The microprocessor stops.

In certain circumstances, the computer goes into sleep mode automatically:

•After a period of inactivity specified in power plan settings

•When the battery indicator blinks orange, indicating that the battery power is low

To return from sleep mode, do one of the following:

•Press the Fn key.

•Open the LCD cover.

•Press the power button.

Also, in either of the following events, the computer automatically returns from sleep mode and resumes operation:

•The ring indicator (RI) is signaled by a serial device or a PC Card device.

•The time set on the resume timer elapses.

Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few seconds before taking any action to reenter operation mode.

Hibernation mode

In hibernation mode, the following events occur:

•The system status, RAM, VRAM, and setup data are stored on the hard disk.

•The system is powered off.

If you have defined one of the following actions as the event that causes the system to go into hibernation mode, perform that action.

•Closing the lid.

•Pressing the power button.

Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power plan settings.

Chapter 4. Related service information 35

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Lenovo 33472YU, S230U manual Power management, Sleep mode, Hibernation mode, Select Master HDP

Contents

ThinkPad S230u Hardware Maintenance Manual First Edition September Copyright Lenovo Contents Appendix A. Notices Iii About this manual Iv Hardware Maintenance Manual General safety Safety information Electrical safety Safety inspection guide Grounding requirements Safety notices multilingual translations Safety information Hardware Maintenance Manual Safety information Perigo Perigo Vorsicht Vorsicht Vorsicht Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Before replacing parts Important service informationStrategy for replacing FRUs Select Drivers & Software Important notice for replacing a system board How to use error messageDynamic Configure To Order CTO Click Warranty & Services Click Check Warranty Status Using PEWFRU identification for CTO, CMV, and GAV products Custom Model Variant CMV Click Product & Parts Detail Click Parts & Accessories What to do first General checkout Following are not covered under warranty Lenovo Solution CenterCheckout guide Quick test programs Tests Tools Uefi diagnostic programBootable diagnostic programs Click Lenovo Bootable Diagnostics Power system checkoutChecking the ac power adapter Checking the backup battery Checking the battery packWire Voltage V dc Checking operational charging Hardware Maintenance Manual Restoring the factory contents by using Recovery Disc Set Related service information Refreshing the computer Hard-disk password PasswordsPower-on password How to remove the power-on password Supervisor passwordHow to remove the hard-disk password Select Power-On Password Sleep mode Power managementHibernation mode Select Master HDP Numeric error codes Wireless off modeSymptom-to-FRU index 0190 Charge the battery pack Symptom or error FRU or action, in sequence 01890191 Run the ThinkPad Setup program, and then save 0199 Run the ThinkPad Setup program, and then save Beep symptoms Error messagesNo-beep symptoms Intermittent problems LCD-related symptomsUndetermined problems Reseat the LCD connectors Hardware Maintenance Manual Indicator Meaning Status indicators Indicator Meaning Special key Description Special keys Special key Description Front view Locating computer controls, connectors, and indicatorsLocations Locating FRUs and CRUs Rear viewBottom view CRU statement for customers Major FRUs and CRUs Description Self-service CRU Optional-service CRU LCD FRUs Hinge Button board Looking up FRU information Hardware Maintenance Manual Screw notices FRU replacement noticesPlastic to plastic Logic card to plastic MTM on rear label Retaining serial numbersRestoring the serial number of the system unit Product ID on rear label Retaining the UuidReading or writing the ECA information Hardware Maintenance Manual General guidelines Removing or replacing a FRU Before servicing the computer Disabling the built-in batteryRemoving the SIM card Hard disk drive or solid-state drive Removing or replacing a FRU Step Screw quantity Color Torque KeyboardRemoval steps of keyboard Removing or replacing a FRU When installing PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless WAN Removal steps of mSATA solid-state drive Step Screw cap Screw quantity Color Torque Keyboard bezel, backup battery, and speaker assemblyRemoval steps of keyboard bezel M2 × 3 mm, wafer-head, nylon-coated Silver 181 Nm Kgf-cm Hardware Maintenance Manual Battery pack Proximity sensors Important notices for replacing a battery pack Removal steps of proximity sensors Removal steps of thermal fan assembly LCD unit Removal steps of LCD unit When installing M2.5 × 3 mm, wafer-head, nylon-coated Silver 181 Nm Kgf-cm Removal steps of DC-in connector DC-in connector Important notices for handling the system board System board and base cover assemblyRemoval steps of system board and base cover assembly Applying labels to the base cover Following illustration shows the location of each label Removal steps of button bezel Button bezelLCD panel Removal steps of LCD panel Button board Removal steps of button board Integrated camera Removal steps of hinge HingeRemoval steps of integrated camera When installing Removal steps of wireless antenna assembly Removing or replacing a FRU Hardware Maintenance Manual Appendix A. Notices Trademarks Electronic emissions noticesPage 1P0B48943