I've owned my distillate for almost two years with no trouble... until last night.  I plugged in and got no signal coming from the bass, and noticed that the LED light was out.  I changed the battery and still, no LED and no sound.  Any suggestions about how to proceed?

Verify voltage of the 'new' battery.
Look for any loose connections.
??

Check/clean the contacts on the 1/4 jack. The battery is switched through the jack.  
 
Keith

Thanks all, but to no avail.  New battery is fine, cords are fine, no obvious loose connections within the electronics cavity and the 1/4 inch jack is clean.
 
Any recommendations for an Alembic Repair shop in central NJ?

For what ever its worth I recently had the 1/4 jack break on me!! On my Distillate. One of the leafs in the jack broke off resulting in no signal path. No comment as far as the LED because I had it disconnected. The jack acts as a voltage switch for the battery as well as the signal.  
 
Best of Luck
Pete

Make sure non of the metal parts (output and prints) is touching the paint in the cavity (which is conductive)