When unit come on, it shows (no bootable devive)

Found Bios went to boot, show boot from usb , i saved and exit , when restart i have flash drive plugged in, does't start from usb. said no bootable device ,

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2947414:01crwdne2947414:0:

Is your USB drive bootable?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0