Hi all,

I've just bought a 2008 XF SV8, I got it for a good price knowing it has a few issues.
One of the problems is a constantly rebooting/flashing front display screen, I also have no audio at all. I work in automotive electronics so I thought this would be a straight forward fix but i'm struggling.

Here's what i've tried so far:

New battery
checked all d2b fibreoptic connections to see if the modules are receiving and transmitting a signal
checked bluetooth module and found one wasn't fitted, just a loop for the d2b signal
fitted a bluetooth module
connected SSD which found a problem with the most network not finding fcdim and acm, I've checked the display (fcdim) but not sure which is the acm
Tried running the software update for the display but it says communication failure, same thing with the audio unit

Any help/ideas would be very much appreciated,

Thanks, Andy