try taking out the gpu from the system and try clearing the cmos of the mb. it may be the mb is locked up in sleep mode.
if you can boot it back with the onboard gpu check the mb bios rev. see that it been updated there are two bios updates for your itx mb.
Okay that sounds logical, I have integrated graphics with the CPU and the CPU is integrated into the board so forgive me my technical ability has failed, im not quite sure how I do that.
Can you further explain what you mean?
Thanks for trying to help