Did it run with 3.1.4 at all before?
Yup. It have been running a couple of times, yet it have always been running extremely hot, so the issue appeared when I wanted to boot it after it have been sitting unused since october last year. (or something around that time period)
I bought the 3.1.4 because the Cloanto branded 3.1 rom was incompatible with my system. (perhaps this gives a hint to were the issue is)
Where did you source the 3.1.4 ROM from? Is it known good? Did you place it properly in the socket?
I bought the 3.1.4 set from that company in Ireland called Sordan. I have not had any issues to this date, other than the a6095 have stopped working in my setup (If running with the 3.1.4 that is).
Maybe 3.1.4 does more severe h/w checks at startup. You might want to to remove and re-seat the memory expansion, and clean the connector inbetween.
Already done that when I experienced the issue. Both CPU on the motherboard and the memory module have been cleaned extremely well with IPA and cotton tips (cue tips). I think the module is working as such, because the mem-test in Systest have been running 2 or 3 complete cycles on the three tests that are (Chip, Fast and Slow) plus yet another couple of cycles with the complete range of mem on one test.