[SOLVED] PC won't boot after crash

[eriol1]

Hello everyone,

Here's my situation:
I build a new PC few month ago and had it up and running fine (only kept the GPU because the market is delirious).
Few days ago I installed Cyberpunk2077 along with a new GPU (2nd hand) which seemed to work fine.
However when gaming yesterday it crashed my PC and now I can't get it to boot anymore.
When I power up everything seems to be working, fans start spinning, HDDs as well, GPU and motherboard ornemental leds light up, but my screen registers no signal.

Here's the steps I already followed:

1. checked the screen with laptop (works)
2. checked with old working GPU (same issue)
3. tried second PCIe slot (same issue)
4. reseated CPU, GPU, RAM, SSD (same issue)
5. replugged every PSU cable (same issue)
6. unplugged every peripheral but the screen, kept one RAM unit only, cleared CMOS by removing battery (still same issue)

EZ Debug LED boot sequence is as follows :
DRAM, VGA, BOOT flash red for an instant
CPU flashes red for few seconds
VGA and BOOT flash for an instant
Leds remain off from there

What I conclude is that the GPU doesn't seem to be the issue (same issue with old one), neither the PSU (power works) nor the RAM (according to led), leaving only CPU and motherboard as possible culprits.
As the CPU has no bent pins I'm leaning towards the Motherboard.

Does anyone have any ideas before I send the motherboard back ?

Any input would be appreciated.

Here's my configuration:
Motherboard: MSI MPG X570 Gaming Plus
CPU: AMD Ryzen 3700X
GPU: MSI Geforce RTX 2070 8GB (old one's a Radeon HD 6800)
RAM: Corsair 2x8GB 3600mhz
SSD: ADATA XPG SX8200 Pro 1TB M.2
PSU: Seasonic Focus GX 650
CPU cooler: Noctua NH-U12S
3 additional HDDs
Case: Fractal Design Define R6

 

[Ralston18]

Will the system boot normally without the additional 3 HDDs?

Will the system boot into Safe Mode without the additional 3 HDDs?

Will the system boot into iGPU (if supported)? No GPU installed.....

How old is that 650 Watt Seasonic PSU? Heavy use for gaming, graphics, or even bit-mining?

 

[eriol1]

Hey Ralston,
Thanks for the answer.
HDDs unplugged make no difference.
There is no integrated GPU, so I can't test that.
The PSU is very recent as the rest of the components are (end of october 2020).
I was putting the PC under some stress with Cyberpunk and RTX enabled over the weekend, but temperature never went over 68°C on the GPU and much less for CPU and motherboard.
Even if, I'd expect a crash due to overheating, not permanent damage.

In any case I don't even get any video output, so I have no clue on what's happening Bios wise.

 

[eriol1]

I also just tested both GPUs on my old computer and I got a display with both of them.
So I can definitely put that off the table.
It has to be something else.

 

[eriol1]

Quick update: Traded the MSI motherboard for an Asus and this time I got white VGA Led .
Breadboarded again and well it's either another faulty motherboard or the CPU.
So I sent the CPU back and I am waiting for a new one.
Keep you posted if it solves the issue.

 

[eriol1]

Final update: Just got my new CPU and finally got to post. Everything works fine now.