I recently built a machine of the following components for reference:
Motherboard: AsRock P55 Extreme
CPU: Intel 2.66GHz Core i5
RAM: 2x2 Gb G Skill DDR3 1600
Graphics Card: EVGA GeForce 9800 GTX+
Power Supply: Antec TruePower New 750W
Wireless Card: Edimax 7128g
OS: Windows 7
So, the problem is this:
Everything seems to be working fine except for the wireless card. (First off, I want to mention, I have tried this card in a friend's machine and it worked fine there.) There is a green and a yellow light on the card and initially (when I first built the machine), both lights would come on and I could connect to the internet. Now, the green light has ceased to light up on startup and the wireless card can find networks but cannot connect to them. I first thought there was an error on my motherboard's "Dr. Debug" display (AA), but it turns out that is not an error at all according to the AsRock support team <http://www.eggxpert.com/forums/thread/600347.aspx>. Now I am at a loss. I have RMAd the card and have the same problem, I have completely rebuilt the machine 3 times now in search of this problem, now I am looking for anything that might point to the problem and a way of fixing it.
PS. Here is a link to the discussion about the motherboard error AA in case someone thinks this is indeed a problem.