Problem with Code to Open Solenoids

Hi.
I don't know if I'm really stupid, or if it's just limited to today, but I cannot make a waveform appear on this oscope/generator.
I need to supply my Nano with an approx. 20Hz 25% duty signal.
I've watched a dozen video on this model and am apparently missing something.
The instruction book help a little, but not enough.
This is the ADS1014D. Very cheap, low performance, but all I need is a general output and also read.
I see guys on YouTube and they have a wave right here.
I've connected the output to ch1 input. I push auto run, and various other buttons.
Basically every button I push just makes the wave parameters window disappear.




Edit: I think this scope is broken. Getting a replacement.