B&K 7250 won't turn on

I bought a 7250 a couple months ago on ebay and after receiving the unit hooked it up to a spare speaker to make sure it worked (theater room is under construction). In the process I blew the speaker while listening to music for a couple minutes and the amp shut off. I was thinking it was a blown inlet fuse but after replacing it I am still not getting it to turn on. I'm guessing it's doubtful the fuse I replaced it with was bad. The amp is sitting on my dining room table right now as I wanted to check all of the fuses. Will it turn on without having anything hooked up to it? Any other suggestions would be wonderful. Thank you for the help