Board was all I came up with as well, Micro and you specified any OTHER ideas so I was keeping my yap shut until you prompted me.
I've been through wireless problems this evening, 4 machines wired, 4 not and all through the same modem. 4 wired worked, wireless didn't but finally got it sorted by spec'cing a new network id and p/w so on we go until the next hitch.
Let us know how yours turned out, Micro, I initially thought p/s just like you, board would seem the next most likely after you've done the mem re-seating etc and you have.