No right channel in new cartridge


I just got a Sumiko Blackbird & mounted it.  I have no right channel. I haven’t fine tuned the mounting but, That shouldn’t make me lose a whole channel.  Once or twice I’ve heard a hum in the right channel before I put the needle down. When it goes down it stops & goes silent.  The channel isn’t effected in CD, DVD or radio.

i bought it here(all positives on the seller) & it only had 10 hours on it. It didn’t come in the original box but came screwed into a box... seemed pretty secure.  I checked & reconnected all the pins, jacks into the AVR & ground wire.

What should I try next?
tochsii
This is a very frail cartridge. Easily damaged as attested to by some reviewers on Amazon.
lewm, he never wanted the cart back.  He didn’t want to give me a refund.  This is probably just too nuanced for a post.  But, he wouldn’t let me return it & blames me.  He would only let me send it to SS for his supposed great relationship & fast turnaround for him personally. 

I never wanted to air all the details.  I put this up as a “help me fix it” post... I only wanted the cart. It was only after warnings that I knew to ask questions.  It’s a lesson learned for me.

As I was counseled here, I opened a case & just sent it back to Smoothy anyway, insured it for new retail with proof of delivery.

Now I just need a few suggestions about carts on this site at $850 or below.  I like things just a tad bright... if you’d (or anyone) give me suggestions I’d appreciate it

As always, thanks everyone for sharing your knowledge.
Audio Technica, Dynavector, Ortofon.  Those are all excellent old-line brands with high reliability and known for their no-nonsense presentation of music.  I own at least one of each of the above, so I am speaking from personal listening experience, which is the only way I ever give advice. You can't go wrong with any of those.  I would not have recommended a Sumiko cartridge, for whatever that's worth.
Post removed