Will Ultra96 boot if internal flash cleared?
Boards boots without SD card. And even with SD card it always boots from internal memory. If I clear it will board dead it it will boot from external SD card? cat /dev/zero > /dev/mmcblk0?
Do you have a USB stick plugged in? What are the MODE switches set to?
The Ultra96 would typically not boot without the SD Card. There is no on-board Flash, so I'm not sure what you are seeing.