Analogue-sequencer

Hello list..  my pled display has gone blank recently.  All connections 
internally look/feel solid.  Where can I probe to check for voltages to 
see if the display is truly dead?

Crystalfontz no longer carries these, of course I still want to use 
PLED (they look so cool) anyone know where I can get one (RED!???)

thanks for any tips.

~Steve