No sound

Check that the tape monitor switch is in the off position!

No sound at all is almost always user error make sure no mute is engaged and definitely check fuses. Also of you disconnected your preamp from the system make sure you re-connected it properly.

Thank you for the suggestion of the Sys.  I’m  just recovering from a hip replacement then dislocation, so I really can’t get into the insides of my system very easily, but I can hire someone to do  it.

I’ll experiment as much as I can.

With the Sys, assuming you have a preamp problem, you are up and running for the price of a cheap tube.

@rvpiano 

Since you have multiple sources, you have ruled out that it is a source problem.

Pretty much leaves the speakers (unlikely) amp or preamp.  If you had a spare amp or preamp you would have already tried them.

If it was me I would order a Sys from Schiit Audio for $49.  This is a passive preamp with input for two sources.  While not a high-end piece, it will allow you to enjoy your music and not rush to make decisions while investigating your next moves.  I have one that I purchased for exactly this reason.  It now sits not used but is available if I need it again.

.

Did you blow a fuse in the component? If you haven't checked the fuse do so.