H100i - Dead blue LED or just a firmware issue?

Chalk me up as another person with a dead or unresponsive blue LED in their H100i - I read a few people suggesting it was firmware, but it used to work fine on 1.0.7 and then suddenly stopped coming on - red and green work, and I've played with the sliders in all combinations but the blue doesn't seem to come on.



Any suggestions for other tricks with firmware changes/etc or is my only option an RMA?



Thanks!