I have a quad and dual, a few years back I was using both without issue. They got shelved for a while and I dug them out to see if I could get them going again. I've tried several images and different sd cards. Currently I am trying to boot the quad board (rev. b1) with the:
WB All (not rev C1): Ubuntu 12.04.2 armel
In the serial terminal I see:
U-Boot SPL 2013.10-00007-g6368217 (Mar 12 2015 - 21:45:17)
Boot Device: SD0
Then it appears to hang. I've tried multiple powersupplies (using a 5 vdc 3a), several sd card brands, building my own kernel etc. I've read the trouble shooting guide, any ideas?