PC won't boot. PSU - OK, Motherboard - OK

[alupascu]

Hello Guys,
Long story short. I have this PC for over 2 years now but for some reason now it does not want to boot up. It boots for a split second and then reboots - in a loop.

What I did: Removed everything from the motherboard except - CPU FAN, North Bridge(CPU - 8 pin) and 20+4 pin Connection but i get same result.

Now it where it gets funny. I switched my PSU with a friend and with his PSU my PC works fine and his PC works with my PSU.

Thoughts?

Update: Our configuration is rather similar. I don't think that this really matters since it worked for 2 years( didn't change something on my configuration).

 

[alexoiu]

Hi, I'd RMA the power supply. It looks like a faulty connection.

 

[Vic 40]

Could well be that on his motherboard psu voltage levels are still considered within tolerance levels and on your motherboard have slided out. Can't be sure where the fault lies,maybe the psu is giving lower than atx levels or that the motherboard sensor is wrong.Seeing that your psu is working fine in your friends pc is the last thing a good probability.

If your friend is okay with it could you just swap psu's and see where this is going or you could replace the psu. The option for rma is as said also an option,but if the psu comes back with being checked and found okay do you know what's the problem.

What motherboards+cpu's+psu's used? Asus has "Asus Antisurge" on their motherboards which sometimes gives these kind of problems.

 

[alupascu]

Could well be that on his motherboard psu voltage levels are still considered within tolerance levels and on your motherboard have slided out. Can't be sure where the fault lies,maybe the psu is giving lower than atx levels or that the motherboard sensor is wrong.Seeing that your psu is working fine in your friends pc is the last thing a good probability.

If your friend is okay with it could you just swap psu's and see where this is going or you could replace the psu. The option for rma is as said also an option,but if the psu comes back with being checked and found okay do you know what's the problem.

What motherboards+cpu's+psu's used? Asus has "Asus Antisurge" on their motherboards which sometimes gives these kind of problems.

Thank you Vic.
I had shifted PSU's with this friend for over 2 months - No problems on either side.

MINE:
Motherboard: ASUS ROG MAXIMUS HERO VII
CPU. i7 4790k
PSU: Thermaltake SMART SE 630

FRIEND:
Motherboard: ASRock 970 Performance/3.1
CPU: AMD FX-8350
PSU: Corsair CX750 Bronze +

 

[Vic 40]

Neither psu is considered great/good quality. I think that the Corsiar is probably better,but i would like to see the Thermaltake be replaced in due time since it already gave problems in your build,but that for you to decide. It might well perform good for some time in your friends build,hard to say for sure.
I do think looking at your motherboard that Asus Antisurge was the thing that makes the pc not work well with the Thermaltake in your pc.It consideres one of the rails out of spec and makes the pc want to shut down or restart in your case.

 

[helpstar]

Did you try it back? Sometimes PSUs unplugged from the power source can work again and after a while will be faulty like before.

Did you plug in one ram stick while trying the minimum config