Korg DW8000, Mono/Poly, MS-20...

Switched my trusty Korg DW8000 on last night (purchased for $90 on 
eBay several months ago) to show off a few new patches and was 
greeted by a bunch of flickering LED's and then dead. Switched it off 
and on, got a "ur EF" message, switched it on again, flashing LED's, 
on again, "ur EF" message, and now, nothing. Nothing at all, totally 
dead. Unplugged power supply cord from both ends, retried 
everything, just dead dead dead.  Tried it later, got random LED's 
twice, but otherwise still dead.

What could this be? Bad power supply? Dead internal battery? Are 
my patches toast? (Which would SUCK...I *LOVE* this rig and had some 
very, very cool stuff on it.)

If it's FUBAR, I'll certainly replace it...but man, this is the LAST 
thing I need this week. 

Tim Hansen