This information about the relay is great. Thanks people!
Now I just gotta figure out what it looks like. So I might post a few pictures so I know which part to try soldering.
I know all about the insides of turntables but the inside of an amp is a mystery to me except for the fuses:)
Page 13 of 23 shows the circuit board of the JVC. This is basically the map of the internals. You may see numbers of the various components silk screened onto the printed circuit board, RV-701 can be found at the right hand side of the CB.
Open the unit and turn on, make sure not to short out any electrical contacts and carefully start tapping this relay with something plastic / non conductive. You may hear the sound come out of your speakers come on or off. If so, it's the relay. Power off, there appear to be 8 solder connections to this relay, reheat and make sure to get the connection to the CB nice and shiny. Do not overheat.
After the joints cool, try turning on the unit again. Hopefully, she'll come back to life. If not, you may have to troubleshoot / replace the relay.
Music is Everything....Except Predictable....WFUV Fan.