I'd dump it myself. Lanzar is not a very reputable brand. It could probably be fixed, by a professional, but for what you'd be charged, you'd be better off getting a new amp.
You could still use it to power a single subwoofer, bridging the "Left +" and "Right -" terminals.
Edit: After looking around the internet a bit, I stand corrected on Lanzar. Public opinion is they're decent, if overrated in wattage. The second part of my first paragraph stands, though.
Last edited by raduque; 10-11-2012 at 08:48 PM.