Chapter10.Troubleshootinganddiagnostics
Thischapterdescribessomebasictroubleshootinganddiagnosticprograms.Ifyourcomputerproblem
isnotdescribedhere,seeChapter11“Gettinginformation,help,andservice”onpage113foradditional
troubleshootingresources.

Basictroubleshooting

Thefollowingtableprovidesinformationtohelpyoutroubleshootyourcomputerproblems.
Note:Ifyoucannotcorrecttheproblem,havethecomputerserviced.Foralistofserviceandsupport
telephonenumbers,refertotheThinkCentreSafetyandWarrantyGuidethatcomeswithyourcomputeror
gototheLenovoSupportWebsiteathttp://www.lenovo.com/support/phone.
SymptomAction
Thecomputerdoesnotstart
whenyoupressthepower
switch.
Verifythat:
Thepowercordiscorrectlyconnectedtotherearofthecomputerandtoa
workingelectricaloutlet.
Ifyourcomputerhasasecondarypowerswitchontherearofthecomputer,
makesurethatitisswitchedon.
Thepowerindicatoronthefrontofthecomputerison.
Thecomputervoltagematchesthevoltageavailableattheelectricaloutletfor
yourcountryorregion.
Themonitorscreenisblank.Verifythat:
Themonitorsignalcableiscorrectlyconnectedtothemonitorandtothe
appropriatemonitorconnectoronthecomputer.
Themonitorpowercordiscorrectlyconnectedtothemonitorandtoaworking
electricaloutlet.
Themonitoristurnedonandthebrightnessandcontrastcontrolsareset
correctly.
Thecomputervoltagematchesthevoltageavailableattheelectricaloutletfor
yourcountryorregion.
Ifyourcomputerhastwomonitorconnectors,besuretousetheconnector
onthegraphicscard.
Thekeyboarddoesnotwork.Verifythat:
Thecomputeristurnedon.
ThekeyboardissecurelyconnectedtoaUSBconnectoronthecomputer.
Nokeysarestuck.
Themousedoesnotwork.Verifythat:
Thecomputeristurnedon.
ThemouseissecurelyconnectedtoaUSBconnectoronthecomputer.
Themouseisclean.Referto“Opticalmouse”onpage89forfurtherinformation.
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