HELP!
After a solid week of mining, my Neptune controller won't recognize my cubes. I have to be missing something simple because I now have 2 controllers like that. I've used recovery SD to RC6, updated to 1.00, 1.02, 1.05, 1.06s and none will see the cubes.
Instead of white flash that's about a second, I now get a short white flash 3x spaced out over probably 15 seconds. No green led

I'm sure this must be common, so what am I missing?
PS: All ribbons are firmly attached. Red strip towards corner of cube and groove in controller. I've tried just one cube and still nothing.
First you should have upgraded directly to 106S but this is not a real problem looks like your ELEMENT14 BBONE-BLACK-4G BEAGLEBONE BLACK REV C, CORTEX A8 is broken... (KNC used older versions A6)
but rev-C fixed a few hardware bugs and 100% compatible with the older A6 rev Just get a new one here.
http://www.element14.com/community/community/designcenter/single-board-computers/next-gen_beaglebone/replace it by carfully removing the old BBB form the control board.
flash the new BBB with
http://www.kncminer.com/downloads/support/neptune/SD_Neptune_rc6.zip from microSD card...
to do this use a fat 16 formated micro sd card max 8 gb
make it booable with
http://www.ptdd.com/fixboot.htm if you use microbullshit products , if you use linux use fdisk and set the boot flag on the partition table .. copt the flis from the zip file on the micro sd card.
put the micro sd in the BBB , power up the board and the BBB , it wil start and a withe , blue , green flashing light tells that flashing is finisched , remove card from beagle , now you sould have version 0.6 or someting , before you connect antything , imeadatly upgrade to 1.06s vir the web interface.
When done connect the cube
the defaults are all cubes off volatage -0.0366
, you need to reconfigure all you miner config including volatage speed , miner account , miner server , etc , if you cant do this soory you sould not have been buying this stuff , it requires some tech skills to operate an miner.
Maby I can buy the stuff from you for a good price

, but if you understand what iam wiriting I hope this is helpfull.
btw you can sevarly undervolt the cubes I have them running as low as -0.0839 volts at 500 mhz!
one miner can use as low as 1880 watts at all cubes at 500mhz.
if your lucky.