Lenovo K4450 Hardware Maintenance Manual - Lenovo K4450 and K4450A - Page 32

Power management, Screen blank mode, Sleep mode, Attention, Power-on password, Supervisor password

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Attention: If you forget the password, there is no service procedure to reset the password. The system board must be replaced for a scheduled fee. • Power-on password: A power-on password protects the computer from being turned on by an unauthorized person. If a power-on password has been set, the user must enter the password before starting the operating system. • Supervisor password: A supervisor password protects the system information stored in the BIOS program. The user must enter the supervisor password to get access to the BIOS program and change system configurations. If you have set a password, you will be prompted to enter the password whenever you turn on the computer. Power management There are three power management modes to reduce power consumption: screen blank, sleep, and hibernation. Screen blank mode In the following circumstances, the computer enters screen blank mode: • The time set on the "Turn off monitor" timer on the Windows 7 operating system expires. To end screen blank mode and resume normal operation, press any key. • You have pressed Fn+F2. To end screen blank mode and resume normal operation, press Fn+F2. Sleep mode When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank mode: • The LCD is powered off. • The hard disk drive is powered off. • The microprocessor stops. To enter sleep mode, press Fn+F1. In certain circumstances, the computer automatically enters sleep mode: • A "suspend time" has been set on the timer, and the user does not do any operation with the keyboard, the hard disk drive, the parallel connector, or the diskette drive within that time. • The battery status indicator blinks orange, indicating that the battery power is low. To cause the computer to return from sleep mode and resume the operation, do one of the following: • Press the Fn key. • Open the LCD cover. • Press the power button. Also, when the time set on the resume timer elapses, the computer automatically returns from sleep mode and resumes operation. Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few seconds before taking any actions to reenter operation mode. 26 Hardware Maintenance Manual

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Attention:
Ifyouforgetthepassword,thereisnoserviceproceduretoresetthepassword.Thesystem
boardmustbereplacedforascheduledfee.
•
Power-on password
:Apower-onpasswordprotectsthecomputerfrombeingturnedonbyan
unauthorizedperson.Ifapower-onpasswordhasbeenset,theusermustenterthepasswordbefore
startingtheoperatingsystem.
•
Supervisor password
:AsupervisorpasswordprotectsthesysteminformationstoredintheBIOS
program.TheusermustenterthesupervisorpasswordtogetaccesstotheBIOSprogramandchange
systemconfigurations.
Ifyouhavesetapassword,youwillbepromptedtoenterthepasswordwheneveryouturnonthecomputer.
Power management
Therearethreepowermanagementmodestoreducepowerconsumption:screenblank,sleep,and
hibernation.
Screen blank mode
Inthefollowingcircumstances,thecomputerentersscreenblankmode:
•Thetimesetonthe“Turnoffmonitor”timerontheWindows7operatingsystemexpires.
Toendscreenblankmodeandresumenormaloperation,pressanykey.
• You have pressed Fn+F2.
Toendscreenblankmodeandresumenormaloperation,pressFn+F2.
Sleep mode
Whenthecomputerenterssleepmode,thefollowingeventsoccurinadditiontowhatoccursinscreen
blankmode:
• The LCD is powered off.
• The hard disk drive is powered off.
• The microprocessor stops.
Toentersleepmode,pressFn+F1.
Incertaincircumstances,thecomputerautomaticallyenterssleepmode:
•A“suspendtime”hasbeensetonthetimer,andtheuserdoesnotdoanyoperationwiththekeyboard,
theharddiskdrive,theparallelconnector,orthediskettedrivewithinthattime.
•Thebatterystatusindicatorblinksorange,indicatingthatthebatterypowerislow.
Tocausethecomputertoreturnfromsleepmodeandresumetheoperation,dooneofthefollowing:
• Press the Fn key.
• Open the LCD cover.
• Press the power button.
Also,whenthetimesetontheresumetimerelapses,thecomputerautomaticallyreturnsfromsleepmode
andresumesoperation.
Note:
Thecomputerdoesnotacceptanyinputimmediatelyafteritenterssleepmode.Waitafewseconds
beforetakinganyactionstoreenteroperationmode.
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HardwareMaintenanceManual