Turns on but no display

[Akse]

Hi, recently I bought a new psu while my old one is in a repair shop In hopes of actually using my pc again in months thing is evrything spins and nothing shows on display I tried swapping ram cleaning ram resetting bios switching cables switching monitors tried with and without the gpu etc. So I was thinking something might be wrong with it so I took my cousins pc to diagnose if my components were acting up or was it the psu I turned on his pc with his psu and it worked perfectly fine booted loaded into windows etc. When I put my psu in it just kinda broke it didnt boot anymore now he got the same problem as me it just spins and nothing displays did same things with his pc as with mine in hopes of fixing it but nothing worked I need some more ideas as of what it is

My pc specs are

MB: Gigabyte h77

CPU: Intel core i5 2500k

GPU: RX 570

RAM: 12GB ddr3

PSU: Be quiet dark power pro 850w

SSD: Biostar 120gb

HDD: Toshiba 1tb, toshiba 250gb

[PeterOz]

Check the cable connection to cpu
you may have the wrong one
some power cables look the same but are different
do you have another cable loose that looks like the cpu cable?

[Akse]

I checked the cable used both 4+4 and 4 pin one and does not work the 4+4 is recognizable since the part that goes in the psu is a 10 pin

[PeterOz]

Hate to ask obvious
You have plugged into cpu fan and not the the ATx_ 12v

[Akse]

Cpu fan and 12v are completly different looking on my motherboard cables went where the cables are supposed to be

[Rustys]

while waiting on @PeterOz and just to confirm

Connected the PSU to the display card?
Plugged monitor into display card?
Reseated the GPU?

Since you swapped the PSU into you cousins’ system the same thing is happening and ever whit their systems PSU back in it still is doing the same?

was the PSU then only thing that you checked?

If you did not properly discharge you and the system could have fried it.

[Akse]

Yup psu connected to the gpu
Monitor is connected to gpu with hdmi
Gpu has been reseated multiple times

Yeah cousins pc started acting up as well even when I plug his psu back in

Yeah psu is about the only thing i checked but everything does spin to life like its supposed to Ill see to plug in his psu into my pc to see if it works or not I seriously doubt that it will

I dont know if I fried something might be the case but I dont think so I turned it off every time and waited a few seconds before taking something out

[Rustys]

Another thing that you can attempt is remove the guts and assemble on a thick piece of cardboard and see if it does the same thing.

[Rustys]

One other thing that you can attempt is remove the Display card and see if there is anything connecting to the display to the onboard.

[Akse]

Another thing that you can attempt is remove the guts and assemble on a thick piece of cardboard and see if it does the same thing.

You mean take it out of the case and assemble the pc on cardboard?

[Rustys]

Yes

would do Post # 9 first

[Akse]

One other thing that you can attempt is remove the Display card and see if there is anything connecting to the display to the onboard.

Integrated is the same story as my actual gpu spins but no display

[Akse]

Yes

Ill try to do that

[Akse]

Cardboard is the same thing still light but no cigar it doesnt work

[PeterOz]

did you use the same monitor when testing both?
Can you try another monitor.
Power monitor off
Does your monitor have vga - if yes can you check via vga?
back on
only have kb and mouse connected
have power straight to socket no powerboards