I would guarentee that is what BestBuy did as that is what they did on my install. If you still have a connected ISO plug and it doesn't work, e-mail support at Empeg. Once I got a new sled with a working connector, the tuner still wouldn't work and support said it was a problem with the board on the unit. Not a common problem but they shoul dbe able to help you figure out where you land and if you need to send the unit back for repairs. Good luck!

Greg