I'm trying to fix a broken amp of mine and came across a part that needs fixing. It's this little tiny rectangular semiconductor, probably 2mm by 1mm. I need to know what they are called since the only number written on it is 580. Help! Pic is below, the part that needs fixing is the same as all those little squares in on the circuit board. Don't know the name, does anyone?
Sorry, pic is a little blurry, but it does make is easier to identify. Any help would be awesome. Thanks!

Sorry, pic is a little blurry, but it does make is easier to identify. Any help would be awesome. Thanks!
