T6 Control Unit not coming on

[flipflopfloss]

Hello! I have a T6 California Ocean, the control unit isn’t turning on, I was looking at replacing the leisure batteries anyway so have now done this but this has made no difference to the control unit.

I have checked fuses (orange 5) and connections to the leisure batteries, cables going to +ve etc which was advice on the forum.

Any other ideas? Could it be the control unit itself?
Thank you!