At least one other member of this forum has recently had his Kenwood receiver fixed, for free, and it was also out of warranty.Contact Kenwood...the address and the name (Hazim Jainoor, as I recall) and all the info you need are in this thread. Email them, and mention this thread that explains the problems that many Kenwood owners have had with these units. It seems to help.
Here it is for your convenience -- I shipped mine to Cerritos:
Kenwood Service Center West