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G5 5000 Service Manual

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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
  • Key Databases
  • System Logs

The following items may or may not reset based on your custom BIOS setting selections:

  • Boot List
  • Secure Boot Enable
  • Allow BIOS Downgrade
  • Password clear

The Master System Password is used to clear the admin and computer password.

To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell.

NOTE: For information on how to reset Windows or application passwords, refer to the documentation accompanying Windows or your application.

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