So I'm building a new computer for my sister, and the parts are...
MSI 880GM-E41 AM3 AMD 880G HDMI Micro ATX AMD Motherboard
Rosewill R519-BK Black Computer Case w/ 500W Power Supply
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 Desktop Memory Model F3-10666CL9D-4GBRL
Western Digital Caviar Green WD7500AADS 750GB
AMD Athlon II X3 435 Rana 2.9GHz 95W Triple-Core Desktop Processor ADX435WFGMBOX Link to Case and PSU
...And a DVD drive, graphics card, etc, but I dont think that really matters right now.
The point is, I cant get the MB to receive power. At first I thought it was the PSU, but I tested it and it cycled on with the paper clip test, and the voltage seemed right. I returned the MB to newegg, and they replaced it. However, I now have the exact same situation. After the first time, I made real sure I didnt short the board, never took off my anti-static wirstband, and took other precautions. But I'm still stuck with a Motherboard thats Power LED won't light up. When I plug in the PSU, the fan doesnt turn on, and neither does the MB.
I checked the power cord, tried a different one, tried different sockets to plug it into, nothing. So either I was unlucky enough to get a second defective motherboard, or something is wrong. Are all of these parts compatible, or does anyone know of something I might be doing wrong? This is only my third computer, so I could have easily missed something.