Not necessarily...
I've got to go to work now, but have a search through the kk2 thread on RCG
http://www.rcgroups.com/forums/showthread.php?t=1675613
This has happened loads before and most seem to revive them. Means soldering the board, though I think.
I'll have a look tomorrow if you can't find it in that massive 1200 page thread...