I was talking about just having the jumper in the the default place/position and not actually attempting to do a cmos reset. Obviously the board doesn't turn on so that won't help anything.
I have a gigabyte motherboard myself and I'm pretty experienced. Having the jumper in the clear cmos position or not having the jumper at all as it should be will prevent the board from powering on.
But I'm assuming he didn't touch that jumper so we'll rule that out.