Lenovo B490 User Manual

•PressFn+F2toconrmwhethertheLCDscreenhasbeenturnedoff.
Iftheproblempersist,followthesolutionto“Thescreenisunreadableordistorted.”onpage49
Thescreenisunreadableordistorted.
Makesurethat:
•Thedisplaydevicedriverisinstalledcorrectly.
•Thescreenresolutionandcolorqualityarecorrectlyset.
•Themonitortypeiscorrect.
Incorrectcharactersaredisplayedonthescreen.
Didyouinstalltheoperatingsystemorapplicationprogramcorrectly?Iftheyareinstalledandcongured
correctly,havethecomputerserviced.
WhenIturnonthecomputer,nothingisdisplayedonthescreenandthecomputerdoesnotbeep
whilestartingup.
Makesurethat:
•Thebatteryisinstalledcorrectly.
•Theacpoweradapterisconnectedtothecomputerandthepowercordispluggedintoaworking
electricaloutlet.
•Thecomputeristurnedon.(Pressthepowerbuttonagainforconrmation.)
Iftheseitemsarecorrectlyset,andthescreenremainsblank,havethecomputerserviced.
WhenIturnonthecomputer,onlyawhitecursorisdisplayedonablankscreen.
Restorebacked-uplestoyourWindowsenvironmentortheentirecontentsofyourharddiskdriveto
theoriginalfactorycontentsusingthepreinstalledrecoveryprogramsonyourcomputer.Iftheproblem
persists,havethecomputerserviced.
Myscreengoesblankwhilethecomputerison.
Yourscreensaverorpowermanagementmaybeenabled.Dooneofthefollowingtoexitfromthescreen
saverortoresumefromsleeporhibernationmode:
•Touchthetouchpad.
•PresstheFnkeyonthekeyboard.
•Pressthepowerbutton.
•PressFn+F2toconrmwhethertheLCDscreenhasbeenturnedoff.
Problemswithdrivesandotherstoragedevices
Thissectionincludesharddiskdriveproblemsandopticaldriveproblems.
Harddiskdriveproblems
Printtheseinstructionsnowandkeepitwithyourcomputerforreferencelater.
Theharddiskdrivemakesarattlingnoiseintermittently.
Therattlingnoisemightbeheard:
•Whentheharddiskdrivebeginsornishesgettingaccesstodata.
•Whenyoucarrytheharddiskdrive.
Chapter9.Troubleshootingcomputerproblems49

Lenovo B490 Specifications

General

Bus type	DMI
Processor cache	3 MB
Processor cores	2
Processor model	i3-2348M
System bus rate	5 GT/s
Processor family	Intel® Core™ i3
Processor series	Intel Core i3-2300 Mobile Series
Processor threads	4
Processor codename	Sandy Bridge
Processor frequency	2.3 GHz
Processor cache type	Smart Cache
Processor lithography	32 nm
Processor manufacturer	Intel
PCI Express slots version	2.0
Processor operating modes	64-bit
ECC supported by processor	No
PCI Express configurations	1x16, 1x8+2x4, 2x8
Thermal Design Power (TDP)	35 W
Maximum number of PCI Express lanes	16
Motherboard chipset	Intel HM77 Express
Internal memory	2 GB
Internal memory type	DDR3-SDRAM
Maximum internal memory	- GB
Memory layout (slots x size)	1 x 2 GB
HDD interface	SATA
Storage media	HDD
Optical drive type	DVD Super Multi
Card reader integrated	Yes
Total storage capacity	500 GB
Compatible memory cards	MMC, SD, SDHC, SDXC
Number of HDDs installed	1
Display diagonal	14 \
Display resolution	1366 x 768 pixels
Native aspect ratio	16:9
Discrete graphics card model	NVIDIA® GeForce® GT 610M
On-board graphics card model	Intel® HD Graphics 3000
On-board graphics card family	Intel® HD Graphics
On-board graphics card base frequency	650 MHz
On-board graphics card dynamic frequency (max)	1150 MHz
LightScribe	-
Audio system	HD
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version	4.0
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Charging port type	DC-in jack
Headphone connectivity	3.5 mm
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
eSATA/USB 2.0 ports quantity	0
Pointing device	Touchpad
Operating system installed	FreeDOS
Form factor	Clamshell
Product type	Laptop
Product color	Black
Processor ARK ID	74542
Supported instruction sets	AVX
Battery life (max)	6.5 h
Number of battery cells	6
Cable lock slot type	Kensington
Cables included	AC
Sustainability certificates	ENERGY STAR
AC adapter frequency	50 - 60 Hz
AC adapter input voltage	100 - 240 V

Weight and Dimensions

Depth	234.6 mm
Width	340 mm
Height	33.1 mm
Weight	2200 g