Hi Everyone,Just run a TEST build before installing into case, but there appears to be a short of somekind.1) Corsair AX1200; when switched ON the motherboard LED light displays (GREEN - power ON) byt the PSU fan does NOT ativate? IS this Normal?2) When shorting the POWER switch pins on the Motherboard (To activate the TEST) the HEATSINK fans move for a Milli-second and then the Corsair PSU trips-out?These are my cable connections:From the Corsair PSU AX1200: I have ONE 24pin Power cable connected directly to the Board + ONE 8 pin power cable (Supplementry)also TWO 8 pin cables connected from the PSU to the GTX graphic cardFrom the HEATSINK: I have ONE cable conneted to the CPU FAN (3 pin) and ONE cable connected to a USB socket on the ASUS P67 MotherboardIs there any way of Eliminating either the Corsair PSU or the ASUS motherboard.Any suggestions, ideas will be greatly appreciated as I'm really P....d off.Regards John

Since it's not in the case - I'd remove everything except the CPU/Cooler, including memory and just connect the PSU. ANy BIOS beeps? ADD memory and repeat. SHould get video error beeps. Continue as necessary connecting the HDD last.Vic

Since it's not in the case - I'd remove everything except the CPU/Cooler, including memory and just connect the PSU. ANy BIOS beeps? ADD memory and repeat. SHould get video error beeps. Continue as necessary connecting the HDD last.Vic

Thanks for the reply,Ive done as you suggest, but still have the same problem. Does anybody happen to know if the PSU fan should activate as soon as I switch on the PSU switch.? The reason I ask is I pulled ALL the cables from the PSU and plugged it directly into the mains, but when I switched it the PSU fan remained idle.Also been researching for the last few hours, and it appears as though I'm not the only one experiencing this problem, (quite a few infact), but they all seem to be pointed the finger towards CORSAIR and the AX1200 PSU.John

Thanks for the reply,Ive done as you suggest, but still have the same problem. Does anybody happen to know if the PSU fan should activate as soon as I switch on the PSU switch.? The reason I ask is I pulled ALL the cables from the PSU and plugged it directly into the mains, but when I switched it the PSU fan remained idle.Also been researching for the last few hours, and it appears as though I'm not the only one experiencing this problem, (quite a few infact), but they all seem to be pointed the finger towards CORSAIR and the AX1200 PSU.John

If you don't connect the PSU to the mainboard, and connect it to the main, turning on the power switch won't do nothing. It will remaind powered off.You need a shorting piece to activate PSU, I got one from my watercooling supplier for water-filling without hardware turning on.This: http://www.chilledpc.co.uk/shop/product_info.php?cPath=60_163_181&products_id=1639To power it on you need to completely connect it to the mainboard, and also the power switch. I don't like the idea of shorting the power pins. Some mainboards have the power switch on them directly.I'd suggest you try connecting the case cables to the mainboard, but without putting the mainboard in the case (should be possible since the cables are usually long enough).It's possible that it's the PSU, but before you send it back I suggest you try doing it properly connected and not shorting.I don't think it's the mainboard.And btw. your 1) -> yes, that is normal, 2) don't know, since you said "shorted"...Theoretically cabling should be enough. CPU is mounted right, since you said heatsink fan spins a bit?