Because the pads were bridged using solder blob to put it in DFU mode, the light turns solid once USB is plugged in. The power on the 3.3v pad when I measured it before bridging was 3.3 V. I am beginning to believe it is a hardware error also as I've attempted all permutations and combinations to get this done. I've never had any issues flashing other boards like APM, NAZE32, 3DR radio, Pixhawk, satellites and hosts of OSD's.