SqueemeisterShut down again, confirm that all problem LEDs are off and fans stop.But I've got the same weird problem when starting it back up. I made a short video of what happens and what I have to do to get it to reboot. Can't post links here, I guess, so just figure out how to youtube the following: qEWoYIhmACw
SqueemeisterBut you know, what you said, "It seems that the mobo's LED headers may be providing voltage when your PC is powered off and feeding it back into the PSU." got me thinking... what if it's the other way around? What if the RGB Splitter is always demanding power from the PSU via SATA but with nowhere to send it, since the fans are forced OFF, the excess is just spilling into the MB's header and then finding its way to any nearby outlet? Would that explain the PSU fan remaining on too? Since the Splitter is basically saying "gimme gimme gimme"?