This should help found it on this website about sony amps
http://www.teamrocs.com/reviews/amplifiers/XM2252HX.htm
These bicolor LED's will go from green to amber to indicate a problem with your setup. They are labeled "Over Current" (you are driving too low of an impedance load or the speaker leads are shorted directly),
"Offset" (the amp is generating DC current - you probably have a ground loop somewhere, check the amp mounting screws for grounding, and your power / ground connections), and "Thermal" (overheating).//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif