I have tried scanning hardware several times today, rebooted, and also did a cold power start.  The scan starts and jumps to 100% almost immediately.  I have run this scan before many times, and it does take about 10 minutes, as stated.  The History shows this: "Hardware Scan Result (Manual) - Default scan - Test Not Started - February 1, 2020 1:51:30 PM" .  SupportAssist itself is showing no errors: it just goes to completion in a few seconds and states "Passed".

I wanted to run this scan because my monitor suddenly blanked out, complaining of no signal.  I did a cold-power start and reseated all of the cables (none were loose), and the problem went away, at least for now.

The computer is a new Dell (October 2019) XPS 8930 Special Edition, running Windows 10 Pro x64, Build 1909, fully updated as of yesterday.

Any suggestions appreciated.  Have a great day.

Regards,
-Phil