1993 corolla radio problem

Hi, I have a '93 corolla and a little while back i had the battery replaced, but the radio did not work. The mechanics took a quick look at it and said that the radio was broken, or maybe the fuse blew. It was clearly their fault but they didn't want to do jack shit about it. I didn't have time to make a big case out of it, so it's been their broken for a long time. I don't got too much cash at this point in time, so i was wondering if their was any way to tell if, indeed, the fuse has blown, or if not, instructions on how to replace the radio. Unfortunately, I do not have the manual, so i don't know which fuse is which, so if anyone could tell me that, or gimme the link to the manual that'd be great. I googled it, but only saw websites selling the manual, or selling radio replacement instructions. I don't know too much about cars, but am an obsessed techy, so am always willing to learn. If someone could post the manual or instructions on how to remove the radio, or anything, i'de be really appreciative. If you post a website, please make sure it's one that isn't selling a manual, usually a couple dollars wouldn't matter too much, but i really don't got any cash to throw around. Thanks in advance.