Fuse? there were blown fuses in my car when i got it, and i noticed there is a fuse in the back of the stereo...could it be blown, which is why it doesnt work? if so, how can i get to it?

A blown fuse is more likely. Most cars have two fuses in the vehicle fuse box that can supply power to the stereo, and there's another fuse built into the back of the stereo unit itself. It's not uncommon for one or more of these fuses to blow when the battery is changed.

fuse maybe located on the back of the radio

For what amp, a Home stereo amp or a car stereo amp? Most car amps will not have internal fuses, but home stereo amps do have internal fuses. You will notice on car audio amps fuses are always plugged into the side of the amps or they have an inline fuse that is on the main power wire into it.
You have more than likely blown a Mosfet Power Transistor, very common in car amps, I'm fixing 3 of them right now with that problem. Class "D" Amps seem to have this problem on a regular basis and they are hard to get working again once they blow. You won't even see any evidence of the bad parts inside the amp either, old amps will fill your car with thick smoke and will have obvious damaged parts. Best bet is you will be looking at buying a new amp unless you paid over $500 dollars for it, it's not worth fixing, check the warranty to have it replaced by the manufacturer.

The short out could have easily blown the stereo and clock display. You will have to replace all three to get them working. The radio could have an inline fuse on it which blew but you will have to pull it out to check.

Just check all fuses.
Also note that many stereos also have a fuse in the back of the unit or inline with the stereo's wiring on the back of the unit. So if you find no blown fuses in the fuse box, then pull out the stereo and check there.

on the driverside plastic panel beneath the steering wheel will be a fuse panel. fuses are forks of metal partially covered in plastic. they are colored. on the back of the panel are diagrams of fuses and the system they protect. find the one named stereo, and pull it out. through the plastic coating you will see a wire. if the wire is broken the fuse is blown and your stereo will not come on. if the fuse is not blown there is also another fuse located in the rear of the stereo component. reaching this one is difficult however and instructions may vary between cars. check these first. if neither is blown either your stereo component is fried or you have wiring issues.

There should be a fuse plugged into the back of the stereo, remove the fuse and check the element of the fuse for being broke in half. Also, check the fuse in the car that supplies power to the stereo.

Yes, most stereos will have a fuse in them. Even the older ones had fuses, but most would have been old-style (glass tube with metal caps) fuse. If your stereo is a newer one, they are usually located on the back of the unit itself; look for a blade -type fuse. This would, of course, require pulling the stereo to access the back side.

Hope this helps!

the fuse might of blown take it off and check the fuse

it sounds like one channel in your amp had shorted and letting dc go to the speaker...a speaker is an electromagnet and requires ac to make it pulse..the amp has a blown channel and would have to be repaired and a factory service center...there is no quick fix..