Did you check the switch for Bios Reset? On my board it was on the wrong position and after change it the board booted without problems
The solution was given by response to a ticket:
The UEFI BIOS Default Restore switch was on position 1-2 which cause a reboot loop
I use the Bold Gear with the included Power Supply but for any reason the system does not boot.
I see the power LED get green then...
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