当电脑不能自检主机不能正常启动问题集---经验谈[精华]

《当电脑不能自检主机不能正常启动问题集---经验谈[精华]》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、当电脑不能自检主机不能正常启动问题集-一经验谈［精华］Whenthecomputercan，tself-check,thehostcan，tstarttheproblemsetproperly1,powerswitchfailureWhenthepowerswitchbuttonforagingcannotresetorchassisfrontpanelbecausedeformationcausenottimelyresetafterthepowerswitchbutton,usetheswitchhasbeenswitchedonstate,thencana

2、ppearafterpressingthepowerswitch,hosttoaddelectricitytostart,butautomaticshutdownafter4seconds・Ifthecircuitofthepowerswitchisshort,whenwepluginthepowersupply,themainenginewillbeactivated,andthenautomaticallyshutdownafterfourseconds・Inspectionmethodtounplugafterbootconnectedtothemothe

3、rboardPWONinterfacepanelswitch,directlywithasmallscrewdrivershortjumper,observewhetherthehostisalso4secondsoffproblems・Ifthefaultdisappears,theswitchcircuitcanbedetermined.TheRESETswitchorjumperisshort-circuitedAlthoughfewopportunitiesforsuchafailureoccurs,butwiththeincreaseofcompute

4、rusetime,non-lockingbuttonswitchusedbyaRESETbuttonwillappearbecauseoftheelasticfailureafterpresscan，tbounce,causealwaysonstate;Orbecausethebuttononthefrontpanelofthecabinetisnotinplaceordeformed,causingtheRESETbuttontobepresseddownandnotRESETintime・Again,becauseofourmaintenance,pull,

5、unintentionallycausedtheconnectiontobeshort・Atthistime,whenwepressthepowerswitch,remainthestateofresetbecausethemainboard,althoughtheutilityhasbeenswitchedon,theCPUfanandpowersupplyfan,graphicscardfan,mainfanarestartingtowork,butthehostdidn，thaveanystartup・IfwehaveaDEBUGcardinsertedi

6、nthePCIslot,weimmediatelynoticethattheRESETlampisalwaysbright,andwecanimmediatelydeterminethatthereisashortconnectionbetweentheRESETrelativepowersupply.ThereisamemoryfailureMemorychipsormalfunctioningoftheresistancecapacity,canappearsometimesbootafterthehostcanaddelectricity,butnotno

7、rmalboot〃di〃sound,noalarm,memoryforalongtimecan，tstart・AnotherkindofcircumstanceisifthefrequencyofthememorywhentheCMOSsetuporrelatedparameterssettingerror,alsocanappearpluselectrichostcanandelectricity,butalsonoalarmisnotstart・Troubleshooting:forsuchafaultwecanpullupthememoryandturno

8、nthemachinef