Help, No sound from Turntable

It is probably a connection issue somewhere in the system or a preamplifier issue i would try to reset the preamplifier by unplugging it and plugging it back in.

Check to make sure the tonearm signal wire LEMO connector is fully seated into its output box. Where the red dots line up.

Mute button?

Do you have a volt meter?

Thank you everyone of the comments.  I've been traveling so haven't had a chance to really try any of the suggestions until today.  I tried previously to shut down both the preamp and the phono preamp and restart in hopes of the problem fixing itself.  No Dice.  

I tried plugging the tonearm cables directly into the Preamp.  No Dice.  

I do here a low "pop" when I turn on the motor to the turntable which is something I've always heard but when I put the needle to the record it's dead as a door nail.  I'm going to try a new cartridge.  I was looking to upgrade anyway.  Anything you would suggest under $2k for a MC cartridge?