What the hell! My PSU is yet again on the fritz. I'm losing a little faith in Corsair PSUs brothers and sisters! Just as well I have a 7 year warranty for this thing. Although it's not an outright failure at the moment the old symptoms are returning as I experienced with my first AX850. At the moment it's not starting straight off the bat when the mains power is switched on. Seems to take a while for the PSU to cotton on to the fact power is there!