I have also experienced difficulty with the Kenwood VR-507 responding to input from the RC-R0720 remote. I not experienced any problems controlling the TV, DVD/CD player, and VCR with this remote, only the VR-507 receiver. Sometimes the receiver would respond to the input from the remote and other times not. This problem started about 3 months ago (August 2004), but only recently has become a more chronic problem. The receiver responds to input from the remote control about 15% of the time now.

Is the microprocessor and reset chip replaceable by the consumer?

Any luck from Kenwood? Thanks!