Hello I have a bit of a problem.

I now have with me one of these motherboards (DQ6). It arrived yesterday.
I got a very good deal. I bought it second hand. Well actually I haven't paid anything for it yet as the guy agreed to send it to me first so that I could test it before paying.

Unfortunately the motherboard doesn't work. When I turn the power on all I get is a black screen. No beep codes. The CPU fan comes on same with the graphics card fan I have tried all the PCI-Express graphics slots and 2 different graphics cards and 2 different power supply units. I have also tried to clear the CMOS. All to no avail.
I have tried everything I can think of.
Any suggestions?

Instead of sending it back to the guy and forgetting about it I am thinking that maybe I could contact Gigabyte and try and get an RMA. Hopefully they will send me a new motherboard. I have never dealt with Gigabyte before.
I am wondering if they would give me an RMA as it is second hand.
If they do give me an RMA what kind of turnaround is there likely to be? I.e time from them receiving it to me getting a motherboard returned to me.

What do you guys think?

Thanks in advance.