Lenovo B575e - Power-On Password; Supervisor Password; Power Management; Screen Blank Mode

Ifanyofthesepasswordshasbeenset,apromptforitwillbedisplayedonthescreenwheneverthe
computeristurnedon.Thecomputerdoesnotstartuntilthepasswordisentered.
Note:Ifonlyasupervisorpasswordisset,thepasswordpromptwillnotbedisplayedwhentheoperating
systemisstarted.
Power-onpassword
Apower-onpasswordprotectsthesystemfrombeingturnedonbyanunauthorizedperson.Thepassword
mustbeenteredbeforeanoperatingsystemcanbestarted.
Supervisorpassword
AsupervisorpasswordprotectsthesysteminformationstoredintheBIOS.Theusermustenterthe
supervisorpasswordtogetaccesstotheBIOSandchangethesystemconguration.
Attention:Ifyouforgetthepassword,thereisnoserviceproceduretoresetthepassword.Thesystem
boardmustbereplacedforascheduledfee.
Powermanagement
Note:PowermanagementmodesarenotsupportedforAPMoperatingsystem.
Toreducepowerconsumption,thecomputerhasthreepowermanagementmodes:screenblank,sleep,
andhibernation.
Screenblankmode
Inthefollowingcircumstances,thecomputergoesintoscreenblankmode:
•Thetimesetonthe“T urnoffmonitor”timerontheWindows7operatingsystemexpires.
Toendscreenblankmodeandresumenormaloperation,pressanykey.
•Y ouhavepressedFn+F2.
Toendscreenblankmodeandresumenormaloperation,pressFn+F2.
Sleepmode
Whenthecomputerenterssleepmode,thefollowingeventsoccurinadditiontowhatoccursinscreen
blankmode:
•TheLCDispoweredoff.
•Theharddiskdriveispoweredoff.
•TheCPUstops.
Toentersleepmode,pressFn+F1.
Incertaincircumstances,thecomputergoesintosleepmodeautomatically:
•Ifa“suspendtime”hasbeensetonthetimer,andtheuserdoesnotdoanyoperationwiththekeyboard,
theharddiskdrive,theparallelconnector,orthediskettedrivewithinthattime.
•Ifthebatteryindicatorblinksorange,indicatingthatthebatterypowerislow.
Tocausethecomputertoreturnfromsleepmodeandresumetheoperation,dooneofthefollowing:
•PresstheFnkey.
•OpentheLCDcover.
•Turnonthepowerbutton.
34HardwareMaintenanceManual