Anyone out there had problems with all four speakers randomly packing up, display still showing cd playing or radio on, tried changing head unit, same problem! did not think there was anything common to all speakers but the head unit unless any one has come across this before and can tell me any different

 

Can you trace the wiring to the speakers back? ISO standard has all speaker connectors on one block.

http://en.wikipedia.org/wiki/Connectors_for_car_audio
Hopefully that page helps explain my ramblings...

HTH

J.