Unplug the cable running from your monitor to your PC and plug it back in, making sure the connection is firm. The most common cause of this error is a loose ...CultureMusicSportsFood&DrinkEntertainmentLifeHomesNewsWeatherShoppingJobsCarsHowtoFixaNo-InputSignaltoaComputerSmallBusiness|BusinessTechnology&CustomerSupport|ComputersByJoshuaPhillipsHowtoTellifYourBacklightIsBurnedoutonaMonitorHowtoPlugaCCTVCameraWithaCat5ECableHowtoSendVGAtoaTVHowtoHideaDellBuilt-InCameraIChangedMyVideoCardandItStillSays"NoSignal"Whenyourbusinessdoesn'thaveanInformationTechnologydepartment,itmayfallonyoutokeepyourcomputersrunningintheeventofanerror.Ifyourmonitorisdisplaying"NoInputSignal,"thereisnoimagedisplayedfromyourPCtoyourmonitor.Thereareseveralpossiblecausesforthiserror.Tofixit,youmustdeterminewhichcomponentisdefective,rangingfromthecablesthatattachyourmonitortoyourPCtothemonitoritselforevenyourPC'svideocard.1Turnoffyourcomputer.2UnplugthecablerunningfromyourmonitortoyourPCandplugitbackin,makingsuretheconnectionisfirm.Themostcommoncauseofthiserrorisaloosecable.3ReattachthecablerunningfromyourmonitortoyourPC.Ifthemonitorisstillnotdisplayingasignalafterfirmlyreattachingthecable,theproblemcouldliewiththecable,especiallyifthecablehasvisibledamage.4Replaceyourmonitorwithanothermonitorifpossible.Ifthe"NoInputSignal"errorstillappears,theproblemdoesnotrestwiththecablesorthemonitor,butwithyourPC.5OpenyourPCcaseandlocateyourvideocard.Removethecardandthenreplaceitfirmlyinitsslotor,ifpossible,insertthevideocardintoanotherslotonyourmotherboard.Avideocardthatisnotmakingafirmconnectionwillnotdisplayimagestothemonitor.CloseyourPCcaseandtestthemonitoragain.6Replaceyourvideocardcompletely.Yourvideocardmaysufferfrominternaldamagethatisnotallowingittooutputasignal.ReferencesComputerHope:NoInputSignalMessageTipsIfyouarestillnotreceivingasignalevenafterreplacingyourvideocard,youmayalsoneedtoreplacethecomputer'spowersupplyand,inaworst-casescenario,yourcomputer'smotherboard.Ifyourcomputerisstillunderwarra