Abit IL-90MV manual Cmos Memory Clearing Header and Backup Battery

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2.3.1 CMOS Memory Clearing Header and Backup Battery

The time to clear the CMOS memory occurs when (a) the CMOS data becomes corrupted, (b) you forgot the supervisor or user password preset in the BIOS menu, (c) you are unable to boot-up the system because the CPU ratio/clock was incorrectly set in the BIOS menu, or (d) whenever there is modification on the CPU or memory modules.

This header uses a jumper cap to clear the CMOS memory and have it reconfigured to the default values stored in BIOS.

Pins 1 and 2 shorted (default): Normal operation.

Pins 2 and 3 shorted: Clear CMOS memory.

To clear the CMOS memory and load in the default values:

1.Power off the system and disconnect with AC power source.

2.Set pin 2 and pin 3 shorted by the jumper cap. Wait for a few seconds. Set the jumper cap back to its default settings --- pin 1 and pin 2 shorted.

3.Power on the system.

4.For incorrect CPU ratio/clock settings in the BIOS, press <Del> key to enter the BIOS setup menu right after powering on system.

5.Set the CPU operating speed back to its default or an appropriate value.

6.Save and exit the BIOS setup menu.

Hardware Setup

iL-90MV

2-3

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Contents Motherboard Intel Socket Core Duo IL-90MVIL-90MV Contents Driver & Utility CD Introduction Features & SpecificationsIeee Motherboard Layout IL-90MV Choosing a Computer Chassis Installing MotherboardShort Open Checking Jumper SettingsCmos Memory Clearing Header and Backup Battery Page USB-PWR1 Wake-up HeadersATX Power Connectors Connecting Chassis ComponentsFront Panel Switches & Indicators Headers FAN Power Connectors CPU Socket 478 Core Duo Installing HardwarePage Hardware Setup 2 DDR2 Memory Slots Floppy and IDE Disk Drive Connectors Hardware Setup Connecting Peripheral DevicesSerial ATA Connectors Additional IEEE1394 Port Header Additional USB 2.0 Port HeadersHardware Front Panel Audio Connection Header Internal Audio ConnectorsHardware Setup PCI Add-on Slots PCI Express X1 Add-on SlotOnboard Status Display Power Source IndicatorsAUDIO1 Connecting Rear I/O DevicesBios Setup Standard Cmos Features Click Enter key to enter its submenu Back to Standard Cmos Features Setup Menu Bios Setup CPU Feature Advanced Bios FeaturesBack to Advanced Bios Features Setup Menu Page Dvmt Advanced Chipset FeaturesPCI Express Root Port Func Back to Advanced Chipset Features Setup MenuBios Setup On-Chip IDE Device Integrated PeripheralsSata RAID ROM On-Chip PCI Device Super-IO Device Onboard PCI Device Power Management Setup Wake Up by Wake# of PCIe Bios Setup PnP/PCI Configurations Bios Setup Abit FanEQ Control PC Health StatusBios Setup Save & Exit Setup Load Fail-Safe DefaultsLoad Optimized Defaults Set PasswordDriver & Utility CD Intel Chipset Software Installation Utility Intel Matrix Storage Technology Driver Intel Graphics Media Accelerator Driver Tips on Hdmi application Page Properties… IL-90MV Realtek Audio Driver USB 2.0 Driver Intel PRO Network Connections DriverIntel Sata Driver Disk Maker Abit EQ The Hardware Doctor Utility Page FlashMenu Bios Update Utility IL-90MV 1 Q & a Troubleshooting How to Get Technical Support?Page Appendix Technical Support Form Sales sales@abit.com.tw Marketing market@abit.com.tw Universal Abit Contact InformationRev