Help, No sound from Turntable

This may sound bizzare, but try plugging the tonearm cables directly into the preamp (bypassing the phono pre).

If you get any  sound, and it won't be good, then the problem is likely the phono pre or the cable from the phono pre to your preamp.  you may have to turn it up to hear without the phono pre.

if not, it's somewhere  starting with the cart and ending with the phono cable from the arm to the phono pre.

What he said.

Tape monitor in the wrong position? 

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.