Name: Lenovo IdeaCentre H520g
Brand: Lenovo
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Intermittentproblems

Symptom:Aproblemoccursonlyoccasionallyandisdifculttorepeat.

Actions:

•Verifythatallcablesandcordsaresecurelyconnectedtothecomputerandattacheddevices.

•Verifythatwhenthecomputerison,thefangrillisnotblocked(thereisairowaroundthegrill),andthe

fansareworking.Ifairowisblockedorthefansarenotworking,thecomputermightoverheat.

•IfSCSIdevicesareinstalled,verifythatthelastexternaldeviceineachSCSIchainisterminatedcorrectly.

(SeeyourSCSIdocumentation.)

Iftheseactionsdonotcorrecttheproblem,runtheLenovoSolutionCenterprogram.Ifyouneedtechnical

assistance,seeChapter11“Gettinginformation,help,andservice”onpage127.

Keyboard,mouse,orpointingdeviceproblems

Selectyoursymptomfromthefollowinglist:

•“Allorsomekeysonthekeyboarddonotwork”onpage115

•“Themouseorpointingdevicedoesnotwork”onpage115

•“Thepointeronthescreendoesnotmovesmoothlywiththemouse”onpage116

•“Thengerprintreaderdoesnotwork”onpage116

•“Thewirelesskeyboarddoesnotwork”onpage116

Allorsomekeysonthekeyboarddonotwork

Symptom:Allorsomekeysonthekeyboarddonotwork.

Actions:

•Verifythatthekeyboardcableissecurelyconnectedtothecorrectconnectoronthecomputer.

•IfyouareusinganEnhancedPerformanceUSBkeyboardandoneormoreoftheRapidAccessbuttons

aretheonlykeysthatarenotworking,thesebuttonsmighthavebeendisabledorhavenotbeenassigned

toafunction.UsethehelpsystemintheEnhancedPerformanceCustomizationKeyboardprogramto

helpdiagnoseproblemswiththeRapidAccessbuttons.

•OntheWindows7operatingsystem,dothefollowing:

1.ClickStart➙ControlPanel.

2.ClickHardwareandSound.

3.ClickDevicesandPrinters.

4.Double-clickUSBEnhancedPerformanceKeyboard.TheUSBEnhancedPerformanceKeyboard

Customizationprogramstarts.

Iftheseactionsdonotcorrecttheproblem,havethecomputerandkeyboardserviced.SeeChapter11

“Gettinginformation,help,andservice”onpage127fordetails.

Themouseorpointingdevicedoesnotwork

Symptom:Themouseorpointingdevicedoesnotwork.

Actions:

•Verifythatthemouseorpointing-devicecableissecurelyattachedtothecorrectconnectoronthe

computer.Dependingonthetypeofmouseyouhave,themousecablewillconnecttoeitherthe

Chapter10.Troubleshootinganddiagnostics115

Lenovo IdeaCentre H520g User Manual

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