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HP Recommended
S140U Portable Monitor
Microsoft Windows 10 (64-bit)

New S140U Portable Monitor, plug into USB port and display goes blank, try to extend to multiple displays and locks up my Elitebook 840.  Downloaded latest driver and retested, get same blank screen.  Connected both USB plugs to laptop and still no change.  When plug in get initial display of HP logo but then goes blank and stays blank.  Power light on back of unit is on.

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