I'm the (proud??) owner of such a device but I prefer the Pie
What I meant - since you have one - maybe you can find an equivalent program to raspi2png for the Droid and be able to test it (not create one from scratch). Something like fbgrab or fbdump maybe.
@nicky_s14 Check if you have a snapshot.png in the /home/pi folder. It's not the folder where raspi2png is located, is the folder where the command was executed.