I am using the GoPiGo, Raspberry Pi 3 Model B+ and a SanDisk 16GB MicroSD card. Using my Mac I installed Etcher and downloaded the DexterOS zip file. I uncompressed the DexterOS zip file and wrote the image using Etcher to the SD card.
However, when I switch on the GoPiGo, the green link blinks indefinitely and does not turn solid. When I plug a monitor into the HDMI port on the Raspberry Pi there is no signal.
What should I try next?