my audio within the nav system is not working. audio button does not bring up display and then display randomly appears but cannot touch and move within display. Actual system works with manual buttons below nav system. but no display as to what stations etc. can play cd's just not see what is playing. took in for service today and asked Acura dealer for help. Only help replacing nav system for $3200. Of course, already have replaced once when under extended warranty because nav side of system was not working. Would taking this to an specialty car audio shop maybe get this fixed? Really upset and disappointed in whole system.