Help please - Rig needs psu flicked off and on to start

Hi Guys,

I've got a problem with my Rig.

Specs:
i7 3770k @ 4.5
SLI EVGA TITAN SC'd
MSI Z77 MPOWER
16GB CORSAIR VENGANCE LP
CORSAIR AX850 PSU
CORSAIR FORCE GT SSD
Switch 810
LG BLUERAY CUP HOLDER

To get it started I need to flick the switch on my PSU on and off a few times quickly and it seems to jolt it into life.

Just turning the PSU off for a while then turning it on and hitting the power button (the one on the mobo) does work. I have noticed something strange though. If I turn it off (the psu) for a while, come back and turn it on the light on the power button (on the mobo) lights up as does the blue light on the I/O panel, but when I press the mobo power button the I/O panel light goes out.

I've removed all my components to see if that'd get it working. I've tried using 2 of my ram sticks (I've 4x4MB ) and then alternating them. Nothing has worked for me.

So I suspect it's either the motherboard or the PSU. Has anyone experienced anything similar before? If so did you figure out which component had gone? Obviously I'd rather not go down the route of RMAing it part by part and spending a few months out of commission.

Many thanks,
Ulijin.

If you take out the power supply, 24pin and a molex cable, you can jump-start the PSU from the 24pin like you have to if you're watercooling:
http://seasonicusa.com/RMABeta/JumpStart/JS.pdf

Connect a fan or something to the molex cable and see if the fan starts. If it doesn't, you'll know it's an issue with the power supply, if it does, maybe put the PSU in a different rig and see how it goes?

Thanks James, good suggestion! I'll try that when I get home.

Hey.

Personally I have seen a PC that had somewhat a similar problem. If the rig is off and so is the PSU power button, after turning everything on I would get the lights for a few seconds and then all died. After pressing a few times the power button it would manage to start the PC. If I would turn of the PC for 15 min everything world repeat itself.

I did not have a second powerful enough PSU to test the rig with, so what I did was connect the second weaker PSU to 50% of components and was jump-starting the whole thing with the green and black cable just like jamesriley94 recommended. This resulted in stable operation.

After getting a new PSU all was fine. But my discovery was that the PC I got from the person had a PSU that was operating on its specified limit of power output. This happen when he replaced the GPU and the power requirement went over the PSU capabilities, so after half a year of gaming is when the issues surfaced for him.
I think your current PSU should be enough for the specs you have, but do not quote me on that, dunno how much two Titans and a 3770k would require power wise especially if overclocked.

Once again like jamesriley94 called out, first try powering a fan with the PSU and then go from there and inform us.

Hope this helps

http://www.extreme.outervision.com/PSUEngine

thats what i use

Thanks for the suggestions guys. I've tried bridging the PSU and it doesn't spin up the fan. Off I go to order a new one, then I'll RMA this one. Argh I hate the RMA process!

I know how you feel about rma im rma ing a asus mobo lol
id would have gone with a 1000 watt psu an ax850 sounds a bit low to me
going by your rig it must be pulling something like 700 watts and doing any kind of overclocking well god know how much your pulling then
its a beast

son of spanner said:

I know how you feel about rma im rma ing a asus mobo lol
id would have gone with a 1000 watt psu an ax850 sounds a bit low to me
going by your rig it must be pulling something like 700 watts and doing any kind of overclocking well god know how much your pulling then
its a beast

Click to expand...

The AX850 should be absolutely fine for that.


I'd recommend you RMAing the PSU before buying a new one. Corsair are very quick on returns - and they'll most likely replace it with an AX860/(i).

jamesriley94 said:

The AX850 should be absolutely fine for that.


I'd recommend you RMAing the PSU before buying a new one. Corsair are very quick on returns - and they'll most likely replace it with an AX860/(i).

Click to expand...

this i rma'd my ram and psu with corsair they do advanced rma basically send you the new parts via a courier and he also picks up the old ones at the same time

well they did that for me then my ram was litrally a day old 1 stick of 4 was DOA but as it was a complete set they had to replace the lot...the psu i had was actually 3 years old hx750w, they replaced it with a ax760w. i sold the old rig it was in a few months ago to fund my new upgrades just wish i kept the new psu oh well..

Thanks for the advice guys. With both the diagnosis and RMA process.

I've already bought an AX860 so I'll wait for that. Wasteful I know but I can't go without my computer and have been burnt a few times by RMA processes so I'd rather not take the risk - although I do agree Corsair generally are very good.

Cheers,
Ulijin.