Dell S3422DW User Manual page 44

Firmware
Service Tag
Reset Others
Factory Reset Restore all preset values to the factory default settings.
NOTE: Your monitor has a built-in feature to automatically calibrate
the brightness to compensate for LED aging.
44 │ Operating your monitor
Display the version of the firmware about the display.
Display the service tag number of the display. The
Service Tag is a unique alphanumeric identifier that
allows Dell to identify the product specifications and
access warranty information.
NOTE: The Service Tag is also printed on a
label located at the back of the cover.
Reset all settings under the others setting menu to the
factory preset values.