If there's blown fuse, it won't just blow, there is some fault looming inside.
was the unit on when making connections? that can sometimes cause problems, once when i was in local tv-shop, i saw on live when tv went poof when staff was putting it in-use. of course there could have been some other reason, maybe it was FOA (faulty on arrival)
you can of course change any blown fuse, but when re-powering, don't plug any cables.
Let it run as idle, and if fuse blows, definitely fault inside