A3 8p stereo dead?

[islayer]

The head unit in my 2011 8p isn't turning on at all? Checked all fuses including one behind the head unit itself and all seems OK. Anybody have any ideas what could be wrong? Also if I need a used head unit does it have to be compatible for my bose speakers

[Rybrook]

You'd need to get a Bose to iso wiring loom adapter.

Also have to run a switched live from the fuse box to the new adapter, to have it turn on when you turn the key.