Question My ongoing crashing issue

Hey, thank you for reading my post and trying to help because I'm becoming more and more desperate, Please , if there is someone who can help me, I'm literally willing to pay him. It's a semi-complicated issue but I'll try to make it as short and coherent as possible. I'm having an ongoing pc crashing problem for almost 10 months.
Brief history of what I did and what happened before:
I upgraded my PC, basically fully except GPU and PSU and everything worked well for like 4 months.
After that period, my PC started crashing randomly, sometimes it ran for couple of days, other times even weeks before it crashing again,
Sometimes just turning on and off power button on the power extension socket was enough, other times I had to re-plug my GPU before it started working again.
All temperatures were ok, so it wasn't overheating.
Knowing that I thought GPU might be the issue so I borrowed a new one, rx 590 and the same thing happened. It crashed after couple of days again,
However that crash was different, I heard loud fan spinning on gpu, it ramped up to 100% before crashing.
So I was convinced now that the old PSU must be the issue, because after that I had an accident where I saw literall smoke coming off from my pc case.
I inspected everything, even PSU but nothing seemed to be damaged, I was even able to start the pc again after an hour or so.
Anyway I bought new PSU, my old was corsair CX600 80+ bronze and I replaced it with Corsair TX750M 80+ Gold.
Unfortunatelly that did not help it and I experienced another crash. But this time, probably because this new PSU is built different, having an additional failsafe mechanism or something in that nature, I wasn't able to start the computer again... well at least not normally. I had to use my old PSU to "kickstart" my PC so it would work again.
I assume old PSU did not have that safe mechanism and that was the reason I was able to start my pc normally.
Somehow after "kickstarting" pc with my old PSU, I was able to reconnect my new PSU again and for some wierd reason, it worked normally.
I googled and asked around and I was told that I need to test different power extension socket and plug it to a different socket.
That miraculously fixed it... so I thought... Today, after 4 months I experienced another crash. Pc won't boot and I will have to "kickstart" it with old PSU again it seems.
Should I call an electrician or where do you think the issue may be?

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Hi @elprokan ,

More information is need to help you.

What is the make and model number of the motherboard? What is the make and model number of the CPU

What actually happens when you turn it on after it crashes i.e. do any lights turn on - case, keyboard etc? Does it start to POST and not succeed? Can you get into BIOS?

Have you got a system speaker connected to the motherboard so that you can hear if any beep error codes are there on startup? Check the motherboard's user manual where to connect the system speaker to the header pins

par

Thank you for your reply.

By the crash I meant PC shutdown, and then when I try to run it back on after flipping on and off switch on an extension socket, new psu does"click" once and nothing happens. I can "kickstart" the pc with my old psu tho. Originally I thought power extension cable was the issue, because after switching psu and gpu my problem persisted but when I changed my power extension socket, it worked flawlessy for 4 months... until yesterday.

PC spec:

GPU: Sapphire r9 280x dual-x

Mobo: Asus TUF gaming b550-plus

CPU: AMD Ryzen 7 5800X

Cooler: ARCTIC Freezer 34 eSports DUO Red

RAM: Corsair 2x8GB kit DDR4 3200 MHz CL16

SSD : ADATA Ultimate SU650 SSD 240 GB

HDD : Seagate BarraCuda HDD 1 TB

HDD: WD Blue 1TB

PSU ( Current ) : Corsair TX750M 80+ Gold

PSU ( Old one ) : CX600 80+ bronze

Case: MAG VAMPIRIC 010X

par

@elprokan

Not sure why you have to reset the power to the PSU?

Normally when a PC crashes there is still power going to the PSU and you press the PC power on button to start the PC again.

Have you set the BIOS to auto restart the PC after a household power supply failure?

What happens if you press the Power on button on the PC after it has crashed? Try holding the Power button for 10 seconds to force stop the PC and then release it and press it again to start it

You can test the PSU using the paperclip test to see if it is OK.

When the PC crashes, turn off the power to the PC and then disconnect the PSU from the motherboard . Reconnect the power to the PSU and then do the test. The PSU should turn on as the test simulates the Power on button being pressed and all the PSU voltages can be checked.

If the PSU is OK then you have to find out why you can't start the PC using the Power on button, maybe the button is faulty

par

Well like I wrote the old psu probably doesn't have current-day failsafe mechanism or something in that nature and allows me to turn pc back on. I was able to turn it back on with my old psu but my new one wont allow it, Doesnt matter if I hold button or just click it, the new psu just does a clicking sound once and that is it.

Edit: Removing gpu allows me to start the pc with new psu, If I plug back my old psu I can start it without removing the gpu. I don't get it.

par

@elprokan

You can start the PC with the GPU card removed but the same problem happened with a different GPU card so it looks like something is dragging down the power to the GPU card.

Different GPU cards and different PSU but the same problem.

It seems as though there may be a problem with the power feed on the PCIe slot.

Not all the power for the GPU comes from the separate power cable connected to the card. The PCIe slot provide up to 75W max as well.

I was hoping before that you had a Intel CPU (that's why I asked) as a lot of them have inbuilt graphics so that you could have tried it using the CPU only and connecting the monitor to the motherboard and remove the GPU card, just to confirm it was tied with the PCIe if the PC now worked OK

You haven't overclocked anything have you?

par

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