The upshot of the trip to the technician, bypassing rather than replacing the headphone jack got one speaker to work, there were some issues getting the other side to work so altogether it was 120 bucks and now it's good as new.  Thanks for the help from everyone on the forum.

Well that makes sense.  There is definitely a broken piece there.  Will take it to have the jack replaced and with luck that's all there is.  Amazing.  Will post the outcome and many thanks again!

Hey JM, tried the headphones, and this is just weird, the jack won't go all the way in.  About halfway and then no farther, tried two different sets of headphones in case I had a defective jack, same thing

Thanks Enzo, it is reassuring to have your analysis of the testing thus far, makes me more confident that a good technician can sort it out.  I'm wanting to give it to a friend who has musical skills but a piece of crap of an amp, so I will take the next step to see if the repair is worth making.  Grateful for the help....

Hi Enzo, I have no idea...may have reached the point where I need to take it to the shop for further investigation.  But many thanks to everyone for your assistance.  Jag

Right Enzo realized after I posted that was a dumb question.  Did the battery test, speakers work.  Knowing that, what would be the next possible area of defect?

Thanks Enzo I'll give it a try.  Does the amp need to be on for this to work?  Or does the battery provide that?

Tried jumping the fx loops, also plugged into the returns of both channels.  Plugged and unplugged repeatedly.  Total silence.  I'm a bit nervous to try the 9 volt battery to speaker test...but to clarify the process, I unplug one of the wires from the speaker and touch one terminal of the battery to the exposed speaker terminal?  Thanks for the help.

It does have the two loops.  So by jumping them, do you mean plugging a cable to the in and the out of both those channels?  And then trying to plug my guitar into the main input jack to see if it works?  Thanks for the advice.  Jag

Hi the speaker wires seem to be pretty solidly attached, will have a better look after work and see about doing the test you're suggesting.  There are two speakers, so can I assume that testing one of them will give me the answer?  Beyond that, the testing with the voltmeter is something I don't know how to do.  Thanks for your help

Hey everyone. I found a Princeton Chorus amp, power lights all operating lights come on.  But no operating sound at all, no pop when power switch flips. Checked with a cable and guitar that I'm sure of.  Visible speaker connections look fine.  Clean looking amp made in USA black grill, not beat up at all.  Any ideas of what the issue could be, or is this too little information to go on?  Thanks