Ford fiesta 2009 Radio stoped working

Hi all, this week the radio gave up and stopped responding to any button pushes.

 Display shows clock only and door open etc, but radio facia buttons do not respond nor does the facia illuminate. Read a fair few posts and so far tried, battery disconnect 2 hours reset, checked 7.5 and 15 amp fuses all OK and purchased a 2nd hand head unit and still no luck. I think the unit not receiving power, When inserting power to head unit i hear what sounds like the CD engage, I can insert and eject cd and use lock button and hazard button. Checked cables on multiplug at rear for 12v supply, which is there although no idea which pins do what. Any help would be appreciated as sort of at a loss now. Is there any other units behind dash that could be causing this or other fuses im missing?  Or does anyone have any good links to wiring schematics that I could try to follow.?
 

Thanks