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
@tochsii I hope you understand that defective MC cartridge (with one channel off) cost no more than $50. And even fully refurbished cartridge can't cost as much as the original.    
One thing: it is sometimes the case that pin orientation is different from cartridge to cartridge. Maybe it’s just miswired. 
Chakster, is there a website where defective cartridges are sold exclusively?
i just wonder how you know so definitely the value.

tochsi, my own opinion of the sumiko is not high, even with 2 good channels. Do what you like, but I’d take the opportunity to get out of the deal, if I were you. You seem like a good guy, so good luck either way.
@lewm yes, this site is ebay and you can monitor the prices by checking expired listings for anything you want.
tochsii This is Steve from VAS. Send your cartridge over to me. I can do the inspection quickly and give you an estimate ASAP. Just email me a few pictures of the connectors on the cartridge and the coil.