This is a REAL big stretch, but are you sure the AEBS card is totally inserted into the slot? Check to make sure nothing is in the slot, aka "packing noodles". True story, a crisis that just got averted yesterday - my dad's 15" AlBook had a faulty latch so he got a replacement. It had an AEBS card installed in it (the original did). So, when he got his, they forgot to install it. They had the Apple Genius (Lance, if you're reading this, you rock ^_^) come on out to our house. Lo and behold, there was a packing noodle that was preventing the AEBS card from going all the way into the slot. A paper clip took it out, but it was a little frustration.