XBMC4Xbox

Hi, picked up a 1.6b with a X3 chip installed. Boots up to Xbox dash fine, but cannot get the chip to run.
Has the 5V led on but nothing else, checked all the connections, they seem fine. No leds on the external adaptor.
Thanks

Okay, so I sorted it, not sure how I have a 1.6a with a X2.6, so I swapped the motherboards and power units. Now all the leds work and boots the chip. The X2.6 works fine on the 1.6b as well I'm not changing them back just in case it stops working. It must have been a loose connections, but I had pulled it all out a checked the continuity twice