Marantz SR4320 2 Channel 80 Watt Receiver AS-IS Parts Repair As this item is being sold AS-IS, this item should be considered to have defects, and we have done our best to disclose them. In the case of an item that doesnt function as intended, there is a chance that other flaws, that we are not aware of, may be present. Please take that into consideration when purchasing. Receiver powers on and tunes correctly. Could not get any sound out of it. All buttons press nicely. Both knobs track as intended. Tried resetting unit and still couldnt get sound out of the speaker outputs. As we do not repair electronics, nor have we attempted any repairs. We list items in a for AS-IS/PARTS REPAIR condition in the hopes that someone that can repair these items, or salvage parts from them that they might find useful. In either case, units sold in an AS-IS/PARTS REPAIR condition, are not returnable. Model#: SR4320/U1BSerial#: MZ000532013442 ELECTRONICS DISCLAIMER: Due to the nature of electronics, Serial numbers have been photographed and recorded, and tamper proof labels are used to prevent tampering. We strive to take excellent pictures and describe items as thoroughly and accurately as possible, but please dont hesitate to ask any questions that you may have. Thanks for looking! EB-12321