[roughshawd]

Assuming my VOM works when it reads over 18vdc on my wall wart...
Why does my digital oscilloscope show nothing?
20v 50ms....

 

[crutschow]

Why does my digital oscilloscope show nothing?
20v 50ms....

Sounds like the input channel is set to AC, not DC.

 

[danadak]

Start with scope set to auto sweep, then adjust trigger settings and channel settings for desired.

Or use DSO auto setup button....

 

[Electronic automation]

Thank you