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From Free Knowledge Base- The DUCK Project: information for everyone
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== AMI CMOS Setup Utility Menu ==AMI - American Megatrends, Inc. CMOS Setup Utility== Troubleshooting ===== BIOS / CMOS Settings Lost on Reboot ===All settings including time and date are lost after system is powered off.Replace the [[CMOS]] battery.=== BIOS / CMOS Settings Lost on Reboot - CMOS battery good ===All settings except time and ate are lost after soft reboot or power cycle. Time and Date are retained.Ensure the "service tag" field in the BIOS Setup has a value. If this field is empty, your [[CMOS]] settings in the AMI [[BIOS]] setup will not be retained, with the exception of time and date.# Press F2 on boot to enter CMOS Setup Utility# Select the "System Info" field# The 4th line under System Overview is "Service Tag" - if this field is blank and you are able to edit the field then you need to enter a value. You can obtain a valid entry from Dell or you can enter an arbitrary number. Once this field is populated press the F10 key and select <nowiki>[Ok]</nowiki> to the dialog "Save configuration changes and exit setup?"Once the service tag field has a value the rest of the bios settings will be retained after a save and reboot. They no longer revert to default values, ergo, it is necessary to have a service tag value if you wish to customize other CMOS settings.