Dell Vostro 3020 Tower Desktop Service Manual - Page 71
Deleting or changing an existing system setup password, Real Time Clock (RTC) reset
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● Lower case letters from a to z. 3. Type the system password that you entered earlier in the Confirm new password field and click OK. 4. Press Esc and save the changes as prompted by the pop-up message. 5. Press Y to save the changes. The computer restarts. Deleting or changing an existing system setup password Prerequisites Ensure that the Password Status is Unlocked (in the System Setup) before attempting to delete or change the existing System and/or Setup password. You cannot delete or change an existing System or Setup password, if the Password Status is Locked. About this task To enter the System Setup, press F12 immediately after a power-on or reboot. Steps 1. In the System BIOS or System Setup screen, select System Security and press Enter. The System Security screen is displayed. 2. In the System Security screen, verify that Password Status is Unlocked. 3. Select System Password, update, or delete the existing system password, and press Enter or Tab. 4. Select Setup Password, update, or delete the existing setup password, and press Enter or Tab. NOTE: If you change the System and/or Setup password, reenter the new password when prompted. If you delete the System and/or Setup password, confirm the deletion when prompted. 5. Press Esc and a message prompts you to save the changes. 6. Press Y to save the changes and exit from System Setup. The computer restarts. Real Time Clock (RTC) reset The Real Time Clock (RTC) reset function allows you or the service technician to recover the recently launched model Dell computers from No POST/No Boot/No Power situations. You can initiate the RTC reset on the computer from a power-off state only if it is connected to AC power. Press and hold the power button for 30 seconds. The computer RTC reset occurs after you release the power button. NOTE: The RTC reset is aborted if the power button is held for less than 25 seconds or more than 40 seconds. The RTC reset restores the BIOS to defaults and resets the computer's date and time. The computer restarts several times during the reset process. Depending on how the computer is configured, you may see LED indications during the period the power button is held and after it is released. Once the reset is complete, the computer restarts and the Dell logo appears indicates reset success. CAUTION: Once RTC reset is complete, the computer may remain in a no-boot status until the time, date, and other BIOS settings are correctly set to boot in Windows. Failing to boot immediately after a reset does not mean that the reset has failed. You must restore the previous BIOS settings, such as the SATA Operation mode (ex. RAID On AHCI) for the computer to reboot normally. The following items are unaffected by the RTC reset: ● TPM (remains on and enabled if it was in that state prior to RTC reset) ● Service Tag ● Asset Tag ● Ownership Tag ● Admin Password ● System Password ● Hard drive Password System setup 71