Honda has no reason to get your hopes up and tell you that they'll replace your head unit until they know what the problem is and that it wasn't tampered with. I know the TSB says you have to get approval from Honda before performing goodwill warranty work - but that's the dealer's job. Other people have had their head units diagnosed, then called Honda and asked for help and got it. But you didn't want to go that route, but that's okay since the dealer did eventually step up.
