PSU issue ?

[Kadan30]

Hi all,

Not sure if I'm posting in the right section but wanted to see what peoples thoughts are on an issue I have with my PC and I'm not sure what it could be, doesn't help not having extra parts to check though.

I have a corsair 850AX power supply and ASUS P6X58D-E mobo plus all the other parts which I don't believe need to be listed.

The issue

I cant power on the PC by using the mobo power button nor the main case power on switch, in order to switch on I have to slightly flick the PSU power button while pressing the mobo switch at the same time, pc will then fire up but sometimes doesn't boot so I repeat and eventually it boots, when it has booted it works perfectly fine, no BSOD's nothing, games run smooth etc, its just simply a pain to switch on.

Any idea what could be at fault ? I guess I should stop doing what I'm doing before I damage anything else also.

History

I have suffered from what appears to be a cold boot issue ever since I had the PC and before this issue I had to turn PC on then off again in order for the PC to be stable or it would crash, maybe over the 3 years of doing this its damaged the PSU or something else.

Thanks

Mike

 

[NeverBackDown]

Is your case's power switch on the right port on your mobos front panel connectors? I would advise only plugging in your psu to the wall and your mobo/cpu/gpu/memory and monitor,do a test bed mock up.

After connecting everything up power on the psu and see what happens. If all of a sudden everything shuts down then your psu may be faulty, if not then switch out your memory one by one.

 

[Kadan30]

Tried exactly that, right to the basics and it wont power on via the mobo power at all, tiny flick on the PSU switch while pressing the mobo power button and it fires up fine.

I have contacted corsair as I believe the PSU's have a 7 year warranty.

 

[airdeano]

does the system fire by shorting the two pins (labeled PWR) with a pocket screw
driver? if not the sensing wire in the PSU harness may be weak (or bad mobo connection),
lack of continuity through the mobo, or PC board is bad in PSU.

 

[Kadan30]

Not tried that yet, one thing I will say is that I can switch it off by the mobo switch when I've finished with it likewise with the main case switch, its just turning the thing on.

 

[NeverBackDown]

Check connections and make sure they are all the way in and connected, also check to see if any pins are bent. If you have a spare rig swap psus in both and test them in each rig. If the corsair fails in the other then you know your problem. If not then it would be your motherboard

 

[KING_OF_SAND]

Get a power supply tester. You can get a cheap one for $30 in which you plug in your 24pin, 4/8 pin, sata etc. If everything checks out you can rule out the power supply. I would not use that PSU anymore until you can confirm that it is okay to prevent any further issues.

If you rule out the PSU it is likely that the motherboard is bad and I would NEVER use it again as it can cause problems. Such problems like CPU, RAM, GPU, etc being fried. A new motherboard will cost you less than $200 (for the most of us). Would rather replace that than $1000 worth of parts.

 

[alpenwasser]

Get a power supply tester. You can get a cheap one for $30 in which you plug in your 24pin, 4/8 pin, sata etc. If everything checks out you can rule out the power supply. I would not use that PSU anymore until you can confirm that it is okay to prevent any further issues.

If you rule out the PSU it is likely that the motherboard is bad and I would NEVER use it again as it can cause problems. Such problems like CPU, RAM, GPU, etc being fried. A new motherboard will cost you less than $200 (for the most of us). Would rather replace that than $1000 worth of parts.

^^^This. I once had a leak in one of my watercooling fittings. Fried one of the two SATA controllers (I didn't notice until later since it was practically not visible). Everything worked perfectly fine for a while, then when I tried to hook up some new 500 GB HDDs the M/B fried all of them instantly, along with one the ones already in the system .
Luckily, I could RMA the new HDDs and had a spare PCB which I could mount on the older HDD to recover my data. Very bloody lucky I was.
Interestingly, the system still worked perfectly fine apart from that controller, which is of course why I didn't notice anything until it was too late.

But yes, get a PSU tester (or RMA it just for good measure) and if PSU is good, replace M/B. Also, make sure your data is safe in the meantime. CPU, memory, GPU etc. can be replaced, data not so much...