Somehow I've got myself a "WTF" dilema with my newly setup Turntable. HELP!

Strange problem indeed.

Is the phono stage new (to you), as well as the turntable? In other words, has this problem always been present since you started using the phono stage?

If so, although I can’t formulate a complete explanation at this point, my hunch is that something is miswired in the output circuit of one channel of the phono stage. Almost (but not exactly) as if a ground wire and a signal wire are interchanged, resulting in the signal on that output of the phono stage being shorted to the phono stage’s ground when a path between that signal and that ground is created by connection of the ground of the good channel of the phono stage to the amp’s ground. Or something like that :-)

Also, am I correct in assuming that these connections are via RCA cables, rather than XLRs?

Finally, can you indicate the make and model numbers of the phono stage and the integrated amp?

Regards,
-- Al

Thanks Al,
The phono stage (Jolida JD9II) was purchased new about 2 years
ago. I used it with another TT with rock solid performance, zero issues.
The TT (Clearaudio Concept) was purchased used recently. I just had
a new cartridge (Hana SH mc) installed and setup professionally.
Al, you are correct, all IC's are single ended. My integrated amp is a
Jolida Fusion 801. 

According to my wife, WTF is World Taekwondo Federation. 

It appears to be your phono stage based on your diagnostic results. You should swap the tubes and see if the problem follows the tube. If so replace the tubes. If not substitute another phono stage to confirm. If that fixes the problem send the phono stage for service.