Motherboard shorted?

[benjamin123]

Hi, so I've got 2 CPU a 5950x and a 3600. 

 

I've got a b450 aorus wifi board, when I put either CPU in the motherboard, the lights turns on and off. When I jump the PC on, there seems to be an overcurrent protection sound coming from the PSU.

 

Should the 8pins CPU be shorted? I've tested the pins with a multimeter and they are shorted with both CPUs in but aren't shorted when I take them out. 

 

Any ideas? 

 

Cheers!

[Bismut]

3 minutes ago, benjamin123 said:

Should the 8pins CPU be shorted? I've tested the pins with a multimeter and they are shorted with both CPUs in but aren't shorted when I take them out.

It sounds like there is a clear path for power through the CPU, which is good if you want to power the CPUs (you need a closed circuit for power to flow). I would not have expected the path to be that clear with the CPU off, but that should not be a sign for concern.

 

5 minutes ago, benjamin123 said:

When I jump the PC on, there seems to be an overcurrent protection sound coming from the PSU.

What made you come to that conclusion?

[benjamin123]

4 minutes ago, Bismut said:

It sounds like there is a clear path for power through the CPU, which is good if you want to power the CPUs (you need a closed circuit for power to flow). I would not have expected the path to be that clear with the CPU off, but that should not be a sign for concern.

 

What made you come to that conclusion?

When I start the PC, there's a singular "click" sound coming from the PSU and nothing turns on. 

 

Also I tried turning on the board with only the 24 pin and everything turned on with a CPU error. Only when the 8pin is connected there will be a "click" sound at the PSU with nothing being powered.

[Bismut]

3 minutes ago, benjamin123 said:

When I start the PC, there's a singular "click" sound coming from the PSU and nothing turns on. 

That sounds like some sort of contactor to me, but there could be a short somewhere too.

 

3 minutes ago, benjamin123 said:

Also I tried turning on the board with only the 24 pin and everything turned on with a CPU error. Only when the 8pin is connected there will be a "click" sound at the PSU with nothing being powered.

That is odd indeed. Have you tried a different PSU or board?

[benjamin123]

3 minutes ago, Bismut said:

That sounds like some sort of contactor to me, but there could be a short somewhere too.

 

That is odd indeed. Have you tried a different PSU or board?

Yes I've tried 2 different PSU a Corsair 650w and a seasonic 500w. No I've only got this b450 board with me. The PSU works since I've got an old fm2+ system and it works fine with both PSU

 

[Bismut]

14 minutes ago, benjamin123 said:

Yes I've tried 2 different PSU a Corsair 650w and a seasonic 500w. No I've only got this b450 board with me. The PSU works since I've got an old fm2+ system and it works fine with both PSU

I would suspect the board to be faulty then. You could try to start it without RAM and see whether another error pops up.

[benjamin123]

Just to update this thread. I found out that one of my MOSFET is shorted. Replaced it and the board works.