Help, No sound from Turntable


Sat down to listen to some vinyl and nothing.  Dead as a door nail.  Yesterday it worked fine.  Digital works fine.  Place the needle on the record and not a peep.  Is there anyway to diagnose where the issue lies?  Is it the cartridge?  Phono pre-amp, pre-amp, etc?   
mvrooman1526
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?   
I would think it would be very rare for a cartridge to go completely dead without a bit of sound. I’ve heard of them becoming quieter, or becoming distorted, etc. But going completely dead quiet? That would seem quite the anomaly.

Before going out and purchasing. $1,500 cartridge, I would suspect something else. A wiring failure somewhere in the turntable/tonearm would be my first thought.

But, if you have no back-up cart, I would go out and buy the cheapest MM cart I could find, ‘bolt it on’, and see if you get sound.
I am sure this is not your problem but it is amusing. I installed a Lyra Etna Lambda, a 9K cartridge. No sound. Tried everything. Nada. Then it occurred to me and my buddy that the VTA had been changed which changed the relationship between the pivot and the cueing lever. The curing lever was down and it sure looked like the stylus was in the groove but it was floating just above it. Re-adjusted the cueing lever and voila!
Before going out to get a new cartridge do the following.
Disconnect cartridge pins and touch the tonearm leads at headshel, if nothing happens then check for continuity internal arm wiring, then tonearm cable and so on. It is unlikely that cartridge, cabling, phono, preamp are faulty.

G