IMPORTANT: Read before posting!
Please include the following items in your post or else it is very hard for someone to help you on a particular issue.
1. What image are you using?
2. Where are you getting your image?
3. What is the file name?
4. Are you flashing to a MicroSD card or eMMC module?
5. If you are not getting video, what tool are you using to flash the image?