This looks as good a place as any to try. I have a VR-309 which has been good to me for many years. I moved and had not used it in a while (about 1yr). I always take the batteries out of the remote when I am not using it to prevent corrosion by way of leaky batteries... but it looks like this was a big mistake...
I know the IR receiver in the unit works because I can use an "all in one" remote to do basic volume, but no input selection and such. I know the remote is still good because I can program in my TV code and CD code and it controls them without a hitch. But the normal tuner control functions don't work at all. Almost like the tuner programming code was lost.
Its an RC-R0608 remote. Does anyone have any idea what this might be? I tried the factory reset described in the manual, but that just erases the codes for the other devices.