Used repair kit, only getting 2.3 volts out of 3.3 wire!
Used the kit and repair guide here: Apple AirPort Express Base Station Power Supply Kit
The 5V supply wire works fine, but the 3.3 volt wire only shows 2.3 volts tops.
Had to disconnect it from the card because when connected to the airport board I see one green flash and then nothing. Checked the voltage on the wires and saw the low voltage on the 3.3V wire. Tried following the paths back but the capacitors and resistors connections look ok.