I have power but no sound, any ideas what's happening. I have the Harmon kardon system in mine if that's any use. I've heard there's a trick to get sound using Harmon kardon?

I'm wanting to upgrade the radio in the freelander 1, I currently have freelander sport 04 & Harmon kardon speakers. How easy is it to install an aftermarket double din system keeping the original Harmon Cardon setup. I want something with Bluetooth etc so I can hook up my phone. I have...