Over the last 3 months or so, the FM Radio signal has been dropping out intermittently on my Yamaha RX-V673 AV Receiver with the Radio and speaker icons disappearing from the display. To prove that it is not a signal or aerial issue (it is connected to a proper FM aerial via a coax cable), I have connected another amp and speaker to the aerial simultaneously using a splitter and when the signal drops out on the 673, it is still fine on the other AV amp. This suggests that it is an issue with the Amp but I was wondering if there is anything I can do without taking it to a repair centre. Any help would be appreciated.