Firstly, i will try to make sure that i have the updated bios version 0517.
If you have the old bios, please update through recovery mode if possible. Follow the instructions on the read me notes.
Then once you have done the update, go to the boot menu in the bios, try to disable Boot to Optical Drive, Boot to Network, Boot to Removable Drives, Boot USB Devices First.
See if this helps.
If you still have problem, then when the system boots up, try to check the POST CODE displayed on the Technical Specification Document for the motherboard from the Intel website. It may give you an idea if there is anything causing it.
Try to remove the optical drive connected and see if there is any different. Make sure that you have at least a PSU ATX Version 2.2
Other than this i dont have any other suggestions.
Hope this helps.