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
