Question Pc won't boot, no POST

Oct 2, 2020
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Hey, forum

I was just casually playing a game on my pc today, nothing interesting really. But then my pc lost power randomly and bricked.
Before that I kept looking at voltage and temperatures - they were okay. No overvoltage, no overheat.
Cpu runs at 65° max, GPU at 50-60° at 70% fan speed, with auto speed (which is about 20~30% temp on GPU goes up to 60~65°)

Right after my pc shut down I check if it was a power out issue. That's not the case, because i still had power in my apartment.
I try to tyrn on the PC but it gives no response, literally nothing happens.
I decided to switch off the PSU for a while. Right after I come back, I switch it back, press power button and I see that fans are spinning, mouse and keyboard are receiving power but there's no post or aaany video response.

My pc doesn't beep by default so I can't really tell what's up.

My parts:
CPU amd 6300fx
PSU be quiet system power9 700W (It's a new one, got a week ago, had no issues with it for a week up until now)
GPU: Amd radeon sapphire R9 390
SSD Kingston 120gb + Windows 10 64bit
HDD WD 1TB
RAM kingston 4gb x 2
Motherboard Gigabyte ga-970a-ds3
cpu fan Aerocool CORE PLUS
2 case fans iCute 12025

  • I tried to swtch ram around
  • Resetting cmos bios
  • Reseating gpu
  • Unplugging HDD. At this rate I don't know what to do. I can't do anything with this junky pc.

I was wondering if it's the outlet issue, but not really, I use a surge protection extension cord. But maybe it has to do something with the case. (Even tho it worked for so many years wth)
 
Oct 2, 2020
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If you just got this new PSU a week ago, do you still have the old PSU to switch back?
Have you tried booting with your graphics card in the 2nd x16 slot?
The old psu I threw away because it broke due to a short circuit.
Its plugged in into pciex16 right now, i haven't tried to switch it to pciex4
 
Last edited:
Jul 2, 2020
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as for the current explanation goes, I do believe is either Motherboard or PSU is failing. My suggestion is get another PSU to try out.
 
Oct 2, 2020
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SO, little update
I have tried literally everything I could and figured that the issue is in the GPU. I replaced the gpu with an old one that doesn't require any psu support. PC booted perfectly straight into windows.

I have no idea why GPU gave up on me.
I have another old card that is barely existing drawing last breaths. It's artifacting a lot. But even so it was working.

The R9 390 one was performing as it should without any issues before yesterday's shutdown. The card doesn't smell burnt so I guess no termal damage has been dealt. /shrug/

The UEFI button on it is lit, the monitor detects the card, as in if I unplug DVI it says "No device connected", if it's connected it says "No signal"

What am I supposed to do even... any ideas?
 

egda23

Prominent
Jun 14, 2020
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SO, little update
I have tried literally everything I could and figured that the issue is in the GPU. I replaced the gpu with an old one that doesn't require any psu support. PC booted perfectly straight into windows.

I have no idea why GPU gave up on me.
I have another old card that is barely existing drawing last breaths. It's artifacting a lot. But even so it was working.

The R9 390 one was performing as it should without any issues before yesterday's shutdown. The card doesn't smell burnt so I guess no termal damage has been dealt. /shrug/

The UEFI button on it is lit, the monitor detects the card, as in if I unplug DVI it says "No device connected", if it's connected it says "No signal"

What am I supposed to do even... any ideas?
Does the old card also need a PCIE electrical connection from the PSU as the R9, or does is it fed by the motherboard's slot ? If this is the case, it could still be a failing PSU, and not failing GPU.
Can you test the R9 390 in another PC ?
 
Oct 2, 2020
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Okay, so... another update.

Basically I have found an old gpu from 2011, Geforce GTX 660, it does require 1 x 6 pin

PSU works just fine, motherboard too, and guess what, my pc booted. After all I guess my gpu died, even though that was the last thing I was expecting it to die on me. I will take it to a repair shop, since it does recieve power but nothing happens on display.

Thanks eveyone for the help! <3
 
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