Question PC Black screens nightmare

Di0g0

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Oct 10, 2012
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Hey,

I’m having black screen issues with my PC for months now. The black screens are very intermittent, it can happen 1 time a day, or 1 time a week, there isn’t any specific way to reproduce it.

Specs:
CPU: Ryzen 1600
GPU: PowerColor Red Dragon RX5600 XT
RAM: Corsair LPX 2x8 GB 3200MHz
PSU: Corsair CX650M
Motherboard: Gigabyte GA AB350 Gaming 3

At first, I thought it was a driver issue, and after many weeks trying to troubleshoot and trying all my options (software side), I tried a system format / reinstall with very few apps to test (GPU drivers, CS GO, Steam, Chrome and Discord). Used the PC for a week with no issues, but after 1 week it happened again (no system changes or new software installed since the clean install day).

The strange part is that until 2 weeks ago, when this happened, my main monitor always became black and the second monitor green, the PC won’t reboot, and to recover, I always had to press the power button to shut it down, and then press it again to power on. The strange thing, is that the last 2 times this happened, the PC started what seemed to be a reboot, but then the motherboard EZ Debug leds started flashing CPU and after that, DRAM, then CPU, then DRAM, at it stays like looping both leds until I press the power button to shut down, and press it again to power on. After that the computer boots normally and it can last for days.

Things I’ve tried (excluding software because I already made a clean install with almost no software):
  • Stress testing components (GPU and VRAM with OCCT, furmark, etc ; CPU ; Memtest from HCI, OCCT PSU test, etc).
  • Reset BIOS to defaults
  • Updating BIOS to the latest stable BIOS available
  • Removed unnecessary USB devices connected to the PC (had some issues years ago because of a bad mouse, so…)
  • Reseat RAM & GPU, and checked all screws and checked that the standoffs are ok.
  • Confirmed that temperatures are ok. Nothing high.
I've no spare hardware to make tests, so I'm trying to find the specific cause for this issue without buying everything new... (GPU's are really hard to get right now). Does anyone have an idea of what can be? PSU? GPU?
 

Di0g0

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Oct 10, 2012
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I don't know if you read everything or if I didn't explain myself clearly. The PC boots fine, the issue happens sometimes while it's in use.

I don't believe it's the RAM because I've already made many tests, running them more than 8 hours, without issues. Anyway, I don't test it that way because it's hard to use the PC with 8 GB only for days. Specially to game (that's when it happens more frequently) :(
 

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