I'm having the same problem...
I had a perfect working dual boot with win7/OS X on my 32GB runcore, then tonight the screen just went blank and reset. From then on the Dell would not recognise the runcore.
I tried to boot off of USB, but when selecting HD 81 (the SSD
) it simply did not detect and drive. I re-installed the standard 16GB STEC and it booted from USB with no problems.
I have now plugged the Runcore into my PC and it is detected.
When plugging the runcore into the Dell via USB it is detected.
I'm at my wits end as to what the problem could be...