1-10
Chapter 1: Product Introduction
Chapter 1
1.1.7 Jumpers
1. Clear RTC RAM (2-pin CLRTC)
ThisheaderallowsyoutocleartheRealTimeClock(RTC)RAMinCMOS.Youcan
cleartheCMOSmemoryofdate,andsystemsetupparametersbyerasingtheCMOS
RTCRAMdata.TheonboardbuttoncellbatterypowerstheRAMdatainCMOS,which
includesystemsetupinformationsuchassystempasswords.
To erase the RTC RAM:
1. TurnOFFthecomputerandunplugthepowercord.
2. Useametalobjectsuchasascrewdrivertoshortthetwopins.
3. PlugthepowercordandturnONthecomputer.
4. Holddownthe<Del>keyduringthebootprocessandenterBIOSsetuptore-
enterdata.
ExceptwhenclearingtheRTCRAM,nevershort-circuittheCLRTCjumper.Shortingthe
CLRTCjumperwillcausesystembootfailure!
Ifthestepsabovedonothelp,removetheonboardbatteryandshortthetwopinsagainto
cleartheCMOSRTCRAMdata.AfterclearingtheCMOS,reinstallthebattery.