I have just setup my first Pi2 and installed rasplex, every time it turns on all I get is the rainbow screen.

I have tried 2 images of rasplex 0.5.1 and 0.6.0, I have tried the delay command in both that people are saying fix it for them and no joy.

All the hardware SD card, Power unit and board is all brand new, so I am not sure what to try next, does anyone have any ideas?

Thanks
Martin