Brick during the upgrade
During the update, power turned off, I tried to restore from the USB flash drive, nothing came out! https://goo.gl/photos/XsoVKKkZrW7YjcRa7
When the power is on, the LED is on, after a while it goes out.
Tried to connect to omega through TTL, nothing comes out.
Are you sure you have proper connection and serial speed? You should have at least some meaningful messages shown during the U-Boot stage.
Can compare with my screenshot