Today i tried my first bit of maintenance/repair on my new truck......

I had a cd stuck in the changer, which was affecting the dvd player also.

i got the the cd unit and actual cd out no problem, but when i replaced the unit, it still would not let anything happen with the cd player.
it went from radio to dvd ok, but kept saying cd error.

i took out the unit again to see if i pushed load could i see the problem, but nothing at all happened.

there is nothing at all comming out - the unit is dead, no clock even.....

could it be something simple like a fuse?
- if so, which fuse(s) do i change?

or have i really screwed up???/

thanks.