That is one hell of a call. I thought about it right as I read your post lol.
it's a mistake many people make, pairing an older Cougar Point chipset with IB without updating the BIOS first to account for compatibility. for now, that's the clear & likely culprit. it could be the memory's incompatible with the board as well, he/she forgot to plug in the power connector to the GPU/CPU, plugged the DVI/HDMI/VGA to the onboard port instead of the GPU, bad DVI/VGA/HDMI cable, or simply a bad, though kinda working board or a bad CPU at worst. the latter two is unlikely but could happen, i guess.