GMAX 1.5+ won't power up at all

#1
Hi guys, Small problem. I bought a new/used gmax 1.5+ from a person on eBay. It was new in box and I finally got a chance to power it up. Nothing happened. No fans, lcd or anything seemed to be getting power. I know I can open claim on PayPal...and probably will...but wondering if there's anything I'm doing wrong? The power supply is a mini ATX, right? Is there a specific brand or wattage? Next I'll get out my meter and see if the boards getting power but I haven't gotten into it that far yet. Any other suggestions?