Well like many others I to have an amp. board problem. I have had this Promedia Ultra 5.1 sound system for about five years now. My amp. board failed about three years ago. I sent it back for repair to Klipsch. It was repaired and returned and has been working great up until now. It appears it has failed again. I contacted Klipsch support for help only to be told they don't market or support this model anymore. Additionally they don't have any amp. board replacements or even replacement subwoofers for sale. I understand that there are two electronics repair shops out there, Sybesma's Electronics that wants the amp. board, metal plate and control unit for service repair for $150. plus shipping and then ther is Elliot-Tronics that I can't get a hold of. Can anyone out there, who's had experiance with either of these repair sources recommend which is the best direction to take based on quality of work, cost, upgrade capability and turnaround time, or where I can get a amp. board new or even referbished. Thanks for your help................JimboC