hello folks, i have a 2005 premier edition ep3 and the head unit has just completely died. fuses are fine, and power is going to it. what are my options for repairing/anyone had this problem and know what could have gone wrong? if it's terminal (RIP music) then where can i source a factory original part?? i've looked on ebay and none of them have the screen with it (it's got factory sat nav). as it's completely unmodded i would really rather not start fitting non-standard parts to it at this point! thanks in advance