Question Need help troubleshooting CPU_LED after weird crash.

[dasp0]

Today I encountered a problem with my PC, and I don't know if this will help but I will write down exactly what happened just incase it makes it easier to solve for someone.

So first I've had this same computer since 2015;
Asus z97-a
Intel i7 4790k
Msi gtx 970 gaming 4G ,
Corsair 16gb 2x8GBcl9 1600mhz
EVGA Supernova G2 750W, 80+ Gold PSU

and It has worked perfectly fine for me until today...

I played some Apex and all of a sudden my two monitors went all black.
I tried turning them on and off praying it wasn't the PC breaking. They didnt get any response at all other than the monitors "asus" popup. So the monitors were working but not getting any response.
One weird thing is that I could still talk and hear discord during this but, after 30sec-ish they couldn't hear me anymore but I could hear them. And then after another 30sec or so I stopped hearing them completely and everything was just frozen ( the PC was still on and running but no picture or sound ).

After a while I decided to restart the computer. It booted up like normal so I decided to check temps just incase it was overheating.
The CPU was at 40 degrees and my GPU was at 104 degress celcius. I believe 104 is a lot for a GPU so I thought "Okay, the GPU is probably just full of dust and that is causing it to overheat".

So I turned it off and cleaned it with compressed air like I usually do.
After cleaning the PC, it seemed to start like usual but, then it died for about 2 sec or so and then it turned on again and was up and running but It wouldn't boot up to the bios.
I didn't get any response at all this time either so I turned it off and tried to boot it up again. It started like last time, with no response, but this time CPU_LED was lit up as RED.

And here I am on the troubleshooting part of it. I tried resetting CMOS and tested my ram one by one. I even checked all of my cables just incase.
All of the fans are spinning in the GPU and CPU. Could it really be a CPU failure even though it felt like it was my GPU from the beginning? Or is it maybe some kind of motherboard issue? I have no clue.

I'm not that good on computers and have a very limited understanding of it so I need some help on what to do next.

 

[Lutfij]

So first I've had this same computer since 2015;
+
EVGA Supernova G2 750W, 80+ Gold PSU
For a PSU that's advertised to output 750W of power to the entire system, will certainly not output that amount after...7 years, assuming it was purchased this month on 2015.

Might want to try and breadboard the system, with one stick of ram, only boot drive and your iGPU, see if that gives you any output with display.

 

[dasp0]

So first I've had this same computer since 2015;
+
EVGA Supernova G2 750W, 80+ Gold PSU
For a PSU that's advertised to output 750W of power to the entire system, will certainly not output that amount after...7 years, assuming it was purchased this month on 2015.

Might want to try and breadboard the system, with one stick of ram, only boot drive and your iGPU, see if that gives you any output with display.

Well, the computer is no longer starting. I can kind of hear some ticking noise coming out from the PSU when I try to start my computer, the motherboard PWR led is lit green but the fans aren't spinning anymore and it just stays there and ticks.

To me it definately sounds like a PSU issue but I don't have any extra parts to check with. Is it possible the motherboard could be the issue? Or is it almost 100% PSU power issue? Just hoping the rest of my parts aren't fried.

 

[Chrisvro]

Today I encountered a problem with my PC, and I don't know if this will help but I will write down exactly what happened just incase it makes it easier to solve for someone.

So first I've had this same computer since 2015;
Asus z97-a
Intel i7 4790k
Msi gtx 970 gaming 4G ,
Corsair 16gb 2x8GBcl9 1600mhz
EVGA Supernova G2 750W, 80+ Gold PSU

and It has worked perfectly fine for me until today...

I played some Apex and all of a sudden my two monitors went all black.
I tried turning them on and off praying it wasn't the PC breaking. They didnt get any response at all other than the monitors "asus" popup. So the monitors were working but not getting any response.
One weird thing is that I could still talk and hear discord during this but, after 30sec-ish they couldn't hear me anymore but I could hear them. And then after another 30sec or so I stopped hearing them completely and everything was just frozen ( the PC was still on and running but no picture or sound ).

After a while I decided to restart the computer. It booted up like normal so I decided to check temps just incase it was overheating.
The CPU was at 40 degrees and my GPU was at 104 degress celcius. I believe 104 is a lot for a GPU so I thought "Okay, the GPU is probably just full of dust and that is causing it to overheat".

So I turned it off and cleaned it with compressed air like I usually do.
After cleaning the PC, it seemed to start like usual but, then it died for about 2 sec or so and then it turned on again and was up and running but It wouldn't boot up to the bios.
I didn't get any response at all this time either so I turned it off and tried to boot it up again. It started like last time, with no response, but this time CPU_LED was lit up as RED.

And here I am on the troubleshooting part of it. I tried resetting CMOS and tested my ram one by one. I even checked all of my cables just incase.
All of the fans are spinning in the GPU and CPU. Could it really be a CPU failure even though it felt like it was my GPU from the beginning? Or is it maybe some kind of motherboard issue? I have no clue.

I'm not that good on computers and have a very limited understanding of it so I need some help on what to do next.

If you’re going to go down the route of replacing components, I’d suggest replacing the PSU first if you’re confident that’s what’s causing the issue, which it definitely sounds like it is.