My bose head unit recently started doing the 'switch to side two, then give the "TAPE ERR" message' I have been using the tape deck with a cassette adapter with no problems for a while now. I bought a new cassette adapter and tried another cassette and I get the same message.

I only use the tape deck for a cassette adapter - Is there any workaround for this? If I open the head unit and disable the motor for the tape deck will that work? I have the bose with the built in cd changer so there is no easy way to add aux in.

 

try hooking up your aux item (mp3 player) with the cassete adapter and start playing it plugged in prior to inserting it into the main unit. then try incerting the cassatte adapter into the player while its allready playing.

 

What brand cassette adapter are you using? I get that problem if I try to use a non-Belkin adapter (i.e. generic eBay one and from Radioshack), but I haven't had that problem since switching to a Belkin adapter (model# F8V366-APL).

 

Make sure the screws holding the cassette adapter are tight. I had the same problem, tightened the screws (they were loose) and then it worked fine.