Latitude 7490 Owner's Manual

Real Time Clock reset

The Real Time Clock (RTC) reset function allows you to recover your Dell system from No POST/No Boot/No Power situations. To initiate the RTC reset on the system make sure system is in a power-off state and is connected to power source . Press and hold the power button for 25 seconds and then release the power button. Go to how to reset real time clock.

NOTE If AC power is disconnected from the system during the process or the power button is held longer than 40 seconds, the RTC reset process is aborted.

The RTC reset will reset the BIOS to Defaults, un-provision Intel vPro and reset the system date and time. The following items are unaffected by the RTC reset:

Service Tag
Asset Tag
Ownership Tag
Admin Password
System Password
HDD Password
TPM on and Active
Key Databases
System Logs

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

The Boot List
Enable Legacy OROMs
Secure Boot Enable
Allow BIOS Downgrade

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Real Time Clock reset

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