Try different usb sticks. Not long ago I tried to boot installation of start9 from usb stick and BIOS didn't even recognize anything is plugged in but then I flashed the image some other USB stick, the BIOS recognized it and I was able to install it. 

I have no Idea why some works with Balena but not recognized bon other devices. 

I lost a few hours before I tried this simple step 🤦🏻‍♀️