Originally Posted by: DeanoCallus
Question 1: Any idea what's wrong with my cab?[/QUOTE]
I'd guess you have a bad wiring connection in your cab or the jack is faulty. You'll need to open it up and have a look. At worst, it'll cost $5 for a new jack, assuming you have basic soldering abilities.

[QUOTE=DeanoCallus]
Question 2: My blown fuse has the markings "T2E" and the new ones have "T2L". Are the new ones safe to use?

You should check your amplifier specifications to see what you can use. If you don;t have them, the website should.

Don't plug it in again until you get the cab fixed. :)