Question can't determine if my CPU or motherboard is not working

chaud57222

Prominent
Jun 11, 2023
7
0
510
hello, I need help from more experienced people, I will try to make as short as possible.
3 days ago I ordered used gpu, did eveything (ddu uninstall old drivers, took out my old cart, out in new card) at first it didn't work, just black screen, so I tried to reseat it few times, reseat RAM, take CMOS baterry out... in one moment when I flipped the switch on my PSU from 0 to 1 there was a smoke coming out of my motherboard (somewhere from the part where all the ports are) and there was a burning smell, I quickly turned the power off, I checked for any damages, my CPU seemed perfect from both sides, I carefuly put it back, no visible damage on motherboard also, so I gave it another try. My PC turned on without problems this time, I was checking temperatures, voltages and stuff for hours and everything was fine, games were fine, working as before.
Later on I wanted to put in my old GPU and uninstalled drivers with DDU, and when I turned off my PC its not turning on again. I tried 3 different GPUs that work on my brothers PC, I tried using 1 ram stick, reseating multiple times, clearing CMOS, unplugging everything for hours. I tested my PSU in other PC and it works, I tried putting my brothers PSU in my PC it doesnt work. So I was able to test almost everything (monitors, cables, gpus, ram, psu...) in my brothers PC and everything is working fine, the only things I cant test are CPU and motherboard, and I dont have service or anyone with lga1700 mobo and CPU.
So what happens is, when I turn on PC, CPU cooler fan is spinning, chassis fans are running at full speed, 1 GPU fans are spinning and 1 are not (I guess 1 has zero rpm or something), my keyboard turns on for half a second then the light turns off, and every time I press the key it turns on again for half a second. The screen stays black the whole time.
My guess is I damaged something when there was a smoke coming out, was lucky to turn it on the first time but not the second. Can someone help me determine if my motherboard or CPU are faulty (asrock h610m-hdv and i5-12400F), thank you for reading!
 

Lutfij

Titan
Moderator
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

Please include all parts used to help you troubleshoot your existing platform.

Thread moved from Components section to Systems section
 

chaud57222

Prominent
Jun 11, 2023
7
0
510
Sorry, there it is:
CPU: i5 12400F
CPU cooler: arctic freezer esports 33 duo
Motherboard: asrock h610-hdv
Ram: 2x16gb 3200 mhz
SSD/HDD: 1x adata 240GB, 1x crucial 480GN
GPU: amd rx 6700 xt and rtx 3070
PSU: tuf gaming 750w
Chassis: thermaltake (I dont know which model)
OS: windows 11
Monitor: aoc 24g2u I think

PSU is 1 year old, latest BIOS version (installed like 2 weeks ago, no problems with it)
 
I was able to test almost everything (monitors, cables, gpus, ram, psu...) in my brothers PC and everything is working fine, the only things I cant test are CPU and motherboard
...Can someone help me determine if my motherboard or CPU are faulty
first try removing all components from the case;
breadboard a basic setup on a non-conductive surface(cardboard, etc).

if the system fails to power up properly;
you will need to test the motherboard and CPU separately.
if you have no associates with a similar system to try, contact a local computer shop and have them perform a diagnostic run on both.
 
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chaud57222

Prominent
Jun 11, 2023
7
0
510
important thing I forgot to mention, before my PC broke, sometimes it would shut down after like a minute after weird squeaky/screeching sounds coming from headphones
 
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