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Pressing the monitor’s power button to turn on both laptop and monitor that are in off state, only the laptop turns on. Affected Platforms: Latitude 7420 Examples of Monitors Supporting DPBS Feature: C2422HE C3422WE C2722DE U2421E U2422HE U3223QZ U3421WE U3821DW U4021QW P3421W
No cause information is available.
Updating to BIOS version 1.29.0 or later on the computer resolves the issue. To download and install the BIOS, reference Dell BIOS and UEFI Updates .
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