yamaha rx-v665 receiver doesnt communicate with the remote

May 22, 2018
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0
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last night the remote suddenly stopped controlling the receiver. none of the controls buttons on the remote did anything. at first I thought it was the remote, but now I am thinking perhaps the remote and receiver don't communicate any longer. are there any test I can do to find out which one has the problem?

before you ask the obvious, yes the batteries are good.