Hi all!

I just joined today and was hoping someone could help me out.
About two years ago, my electric guitar was plugged into my Fender Champion 300 amplifier.
When I turned on the amp, the light was on but no sound came out when I strummed the guitar.
I went back to the switch and tried to turn off the amp. It was REALLY hard for me to push it in.
I forced it, however, and now the switch feels "loose" - perhaps broken.

What do you think the original problem was? What should I do about that and now my seemingly broken switch?

Thanks!