The most likely cause would be that whatever's on the flash drive you're trying to boot from, isn't bootable. You haven't given us much to go on - if you need more information:
What are you trying to do?
What's on the flash drive and how was it prepared?
ejn63
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Posted August 25th, 2020 15:00
The most likely cause would be that whatever's on the flash drive you're trying to boot from, isn't bootable. You haven't given us much to go on - if you need more information:
What are you trying to do?
What's on the flash drive and how was it prepared?
What model system?