Question Did my cpu or mobo get shorted?

[Mr. Schwul]

System:
CPU: R7 2700X
GPU: RX590
MOBO: Msi B450 Gaming Plus Max
RAM: 2x8Gb Oloy
STORAGE:
2Tb Samsung m.2
1tb sata hdd
PSU: Evga 700BQ
OS: Debian 12

I was waking the computer up from hybrid-sleep when the CPU led light illuminated on the mobo. This has happened a lot before and i still haven't figured out exactly why. Turning the psu power switch off then on always fixed it though, until this time. This time only the "Gaming Plus" led text on the mobo illuminated very briefly then turned off. The fans didnt even turn on.

I looked at the psu and inside there were some pet hairs that had accumulated. I blew them out and tried again but nothing changed. I tried the old psu and it still seemed to only get power briefly. I tried the old and new psu on my other system and both of them worked.

My theory is that the pet hair shorted either the mobo or cpu out, or both. When I blew the psu out it "fixed" the psu. My question is how do i figure out if its the mobo or cpu that got shorted? Should i trust the psu anymore? Or could it be something else entirely?

Its worth mentioning that i did all sorts of other diagnostics: Reapplied thermal paste, reset cmos battery, took out all unnecessary conponents, and even tried starting mobo out of the case and on cardboard. I also examined the mobo as much as i could with naked eyes for any signs of burning, wet spots, swollen capacitors, or just generally anything that looked out of the ordinary. I found one capacitor thats tilted but im not sure if thats significant; Ill attach a photo just in case: https://drive.google.com/file/d/1D7D_CMa1U9cIE4a_32isRKF-dbiNb_I2/view?usp=drivesdk

 

[Lutfij]

MOBO: Msi B450 Gaming Plus Max
Might want to use this guide;

View: https://www.youtube.com/watch?v=cU7ZMmSmu20

and see if your can revive the paltform.

I tried the old and new psu on my other system and both of them worked.
What is the make and model of your PSU's and their age?

CPU: R7 2700X
Processors have been known to fail even end up DoA. If reflashing the BIOS doesn't help, you can drop your processor onto a known working motherboard with the right BIOS version to rule out your processor going kaput.

 

[Mr. Schwul]

MOBO: Msi B450 Gaming Plus Max
Might want to use this guide;

View: https://www.youtube.com/watch?v=cU7ZMmSmu20

and see if your can revive the paltform.

I tried the old and new psu on my other system and both of them worked.
What is the make and model of your PSU's and their age?

CPU: R7 2700X
Processors have been known to fail even end up DoA. If reflashing the BIOS doesn't help, you can drop your processor onto a known working motherboard with the right BIOS version to rule out your processor going kaput.

Starting with flash the bios:
I took everything off the mobo except for the cpu, I left it in. The mobo power cable and cpu power cable i left plugged in because the manual told me to. Holding and releasing the bios button results nothing for a bit but then a very faint chirp is heard from the board. If I remove the usb and hold the button, the bios light flashes 3 times and the board does not chirp.

Then something interesting happened. I unplugged the cpu cable and tried again. This time the bios seemed to flash properly. Even more interesting, the board will now turn on (with a cpu light). If I try to plug the cpu cable back in the board will instantly die and a short can be heard. I removed the CPU from the socket and this still happened.

So the cpu power plug in is shorted out somehow, i think. I would think if its the processor then the board wouldnt short out when the cpu cable is plugged in? What do you guys think?

And the original/current psu is a EVGA 700BQ Bronze. P/N: 110-BQ-0700. Its roughly 3 or 4 years old? Newegg hard locked me out of my account for no reason so I cant see the puschase date. Theres no date on the psu itself.

The older spare psu is a Rocketfish M/N: RF-700WPS2. The date on it is 2008/06/26.

I unfortunately dont have any spare AM4 mobos or processors, my last system was AM3+. The processor is not super old or at least I havent had it too long, maybe 3 years.

 

[Lutfij]

EVGA tend to have hit or miss units within their own top tire lineups. Please don't hook that Rocketfish PSU to anything anymore.

You should source(borrow, not buy) a reliably built 650W PSU from your friend or neighbor and see if that helps revive your build. Please be wary that troubleshooting doesn't mean you go buy replacement parts. If that's the point you're at, you're better off going to a nearby PC repair shop that can help diagnose the problem.

 

[Mr. Schwul]

EVGA's tend to have hit or miss units within their own top tire lineups. Please don't hook that Rocketfish PSU to anything anymore.

You should source(borrow, not buy) a reliably built 650W PSU from your friend or neighbor and see if that helps revive your build. Please be wary that troubleshooting doesn't mean you go buy replacement parts. If that's the point you're at, you're better off going to a nearby PC repair shop that can help diagnose the problem.

Yeah no one I know has a pc. They either have laptops or consoles unfortunately. Ill probably have to take it to a repair shop. But thanks for all your help.

 

[beyondlogic]

System:
CPU: R7 2700X
GPU: RX590
MOBO: Msi B450 Gaming Plus Max
RAM: 2x8Gb Oloy
STORAGE:
2Tb Samsung m.2
1tb sata hdd
PSU: Evga 700BQ
OS: Debian 12

I was waking the computer up from hybrid-sleep when the CPU led light illuminated on the mobo. This has happened a lot before and i still haven't figured out exactly why. Turning the psu power switch off then on always fixed it though, until this time. This time only the "Gaming Plus" led text on the mobo illuminated very briefly then turned off. The fans didnt even turn on.

I looked at the psu and inside there were some pet hairs that had accumulated. I blew them out and tried again but nothing changed. I tried the old psu and it still seemed to only get power briefly. I tried the old and new psu on my other system and both of them worked.

My theory is that the pet hair shorted either the mobo or cpu out, or both. When I blew the psu out it "fixed" the psu. My question is how do i figure out if its the mobo or cpu that got shorted? Should i trust the psu anymore? Or could it be something else entirely?

Its worth mentioning that i did all sorts of other diagnostics: Reapplied thermal paste, reset cmos battery, took out all unnecessary conponents, and even tried starting mobo out of the case and on cardboard. I also examined the mobo as much as i could with naked eyes for any signs of burning, wet spots, swollen capacitors, or just generally anything that looked out of the ordinary. I found one capacitor thats tilted but im not sure if thats significant; Ill attach a photo just in case: https://drive.google.com/file/d/1D7D_CMa1U9cIE4a_32isRKF-dbiNb_I2/view?usp=drivesdk

From personal experience avoid MSI also buy a PSU tester it will tell you if the PSU is the issue by beep codes for a digital. Lights for old ones.

I've owned 3 MSI all died spectacular

 

[Mr. Schwul]

Update for any who find this thread from googling.
I took it to a shop and they swapped some parts around. It ended up being the motherboard. They tested the power supply and it was fine. I ended up getting an AsRock b450m.
I kinda wish it were the processor cause at least then I could upgrade instead of just going back to the same lol. But thanks everyone for helping with diagnostics.