Supermicro custom BIOS, power-cycles continuously

[yshragai]

I flashed a custom AMI-based BIOS onto a Supermicro X10DRT-L system, using a SPI programmer.
Programming was successful, at least based on the LEDs on the tool and the output from the software.
I turned the computer on.  The fans come on for less than a second and turn back off.  This repeats every 5 seconds (exactly).  There is no output whatsoever.
What could be causing this?
I did not play around with the ME area of the BIOS.
Is it possible that IPMI parameters need to be modified?

Thanks!