I have just received my DSO Nano V1 and am on the learning curve.
Doing OK mostly, however I find that if I switch on with an SD card in situ all I get is a blank screen. I have to switch off, remove the card, switch on then replace the card.
If this normal - the manual is a bit thin in some ways.
Also holding the “run/stop” button when switching on with the scope attached to the PC seems to do nothing in particular.
Otherwise this is a great little device.