Systemic motherboard problem


Mar 2, 2009
Hello, my current motherboard and the last two I've had all have had some very odd issues. The other two both had their onboard lan cards malfunction, and my current ones onboard wifi isn't even showing up in windows. There seems to be something wrong with the usb port as well, because my Sandisk View mp3 play won't connect (works fine on other computers.

Could this be a grounding problem? Or maybe a psu problem? I've never seen a good guide on either of those topics although I did find this, but its a few years old.
Here's my mobos and my power supply I've used with them.

MSI KT6V-LSR (dead lan)
GIGABYTE GA-M61SME-S2 AM2 (dead lan)
ASUS M2N32-SLI Deluxe (dead wifi)

Antec SmartPower 2.0 SP-400 400W ATX12V

Thanks a lot