Lenovo ThinkPad Edge E520 User Manual

Solution:Checkwhetheranexternalmonitorwasdisconnectedorturnedoffwhilethecomputerwas
insleep(standby)mode.Ifyoudisconnectedorturnedofftheexternalmonitor,connectitorturniton
beforeresumingthecomputerfromthesleep(standby)mode.Whenresumingthecomputerfromthe
sleep(standby)modewithoutattachingtheexternalmonitororturningiton,andthecomputerdisplay
remainsblank,pressF6tobringupthecomputerdisplay.
•Problem:Thecomputerdoesnotreturnfromsleep(standby)mode,orthesystemstatusindicator
(illuminatedThinkPadlogo)blinksslowlyandthecomputerdoesnotwork.
Solution:Ifthesystemdoesnotreturnfromsleep(standby)mode,itmayhaveenteredsleep(standby)or
hibernationmodeautomaticallybecausethebatteryisdepleted.Checkthesleep(standby)indicator.
–Ifthesystemstatusindicator(illuminatedThinkPadlogo)blinksslowly,yourcomputerisinsleep
(standby)mode.Connecttheacpoweradaptertothecomputer;thenpressFn.
–Ifthesystemstatusindicator(illuminatedThinkPadlogo)isoff,yourcomputerisinpower-offstateor
inhibernationmode.Connecttheacpoweradaptertothecomputer;thenpressthepowerbutton
toresumeoperation.
Ifthesystemstilldoesnotreturnfromsleep(standby)mode,yoursystemmaystoprespondingandyou
maynotbeabletoturnoffthecomputer.Inthiscase,youneedtoresetthecomputer.Ifyouhavenot
savedyourdata,itmaybelost.Toresetthecomputer,pressandholdthepowerbuttonfor4secondsor
more.Ifthesystemisstillnotreset,removetheacpoweradapterandthebattery.
•Problem:Yourcomputerdoesnotentersleep(standby)orhibernationmode.
Solution:Checkwhetheranyoptionhasbeenselectedtodisableyourcomputerfromenteringsleep
(standby)orhibernationmode.
Ifyourcomputertriestoentersleep(standby)modebuttherequestisrejected,thedeviceintheUSB
connectormightbedisabled.Ifthisoccurs,doahot-unplug-and-plugoperationfortheUSBdevice.
•Problem:Thebatterydischargesslightlywhilethecomputerisinhibernationmode.
Solution:Ifthewakeupfunctionisenabled,thecomputerconsumessmallamountofpower.Thisisnot
adefect.Fordetails,referto“Power-savingmodes”onpage37
.
Drivesandotherstoragedevices
Thissectionincludesharddiskdriveproblemsandopticaldriveproblems.
Harddiskdriveproblems
•Problem:Theharddiskdrivemakesarattlingnoiseintermittently.
Solution:Therattlingnoisemightbeheard:
–Whentheharddiskdrivebeginsornishesgettingaccesstodata.
–Whenyoucarrytheharddiskdrive.
–Whenyoucarryyourcomputer.
Thisisanormalcharacteristicofaharddiskdriveandisnotadefect.
•Problem:Theharddiskdrivedoesnotwork.
Solution:InthestartupmenuintheThinkPadSetup,makesurethattheharddiskdriveisincludedinthe
“Bootpriorityorder”list.Ifitisincludedinthe“Excludedfrombootorder”list,itisdisabled.Selectthe
entryforitinthelistandpressthexkey.Thismovestheentrytothe“Bootpriorityorder”list.
Opticaldriveproblems
•Problem:Theopticaldrive,suchasaCD,DVD,orCD-RWdrive,doesnotwork.
154UserGuide

Lenovo ThinkPad Edge E520 Specifications

General

Memory slots	2x SO-DIMM
Internal memory	4 GB
Memory clock speed	1333 MHz
HDD speed	5400 RPM
HDD interface	SATA
Processor cache	3 MB
Display diagonal	15.6 \
Display resolution	1366 x 768 pixels
AC adapter power	65 W
Operating system installed	Windows 7 Professional
Infrared data port	No
Speaker power	1 W