cheers for that bud, it makes it better to have someone who knows the system to bounce ideas off of, the SDD diagnostic software i ordered arrived yesterday and i have set it up on my laptop now, so will get everything connected later and see if...

well, i spent a few hours on it yesterday, ripped everything out the back compartment, checked that the optical cables to the touch screen were oriented the correct way, they were, i checked the cables to the power supply plug to the screen...

So, the plot thickens, I have checked the fibre optics, made sure they are orientated the correct way, I stripped everything out of the back and switched the car on, I still get no signal in the back unless I bypass the touch screen, I’m going...

Cheers for all your help buddy, i will see how i get on and will let you know if its a happy face or sad face lol

I will try and get some time later to double check the in and out optics to make sure they are in the right orientation, I've lost track of what i have done so far, i will put the bypass loop on the rear connector with the rest of the rear...

No bud, no signs of life on the screen at all, the only thing i now get, since replacing the IHU is the flashing orange light on the power button,

just re-read your reply, yes, if i loop the screen, then i get signal to the rear, i might just put the old Amp back in, as i wasn't sure if the amp is also hard wired to the screen, so if it's faulty maybe it's not allowing the optical signal...

I've not tried that as i have no signal getting to the rear (disconnected the white wrapped optical harness from the female connector as it enters the rear compartment, no signal there if the touch screen is connected,

I did find this online, it was an AI answer to whether a faulty amp would still allow an optical signal to the rear modules, but it would explain my issue: No, with a faulty amplifier (amp) in an L322 Range Rover, the optical signal may not reach...