PC build doesn't post

[Jordancj]

Hi so just built a PC then and it won't post and no signal to the monitor, have tried connecting the HDMI to the Mobo and the GPU and both don't work fabs and lights spin and it beeps one long beep and 3 short beeps.

Specs are

And ryzen 5 3400G

ASRock x570 steel legend 

Corsair vengeance lpx 3200mhz 2x 8gb stick

Gigabyte GeForce 1660 6gb

Wd black 2tb

Crucial 2.5" 500gb ssd

[MadAnt250]

12 minutes ago, Jordancj said:

Hi so just built a PC then and it won't post and no signal to the monitor, have tried connecting the HDMI to the Mobo and the GPU and both don't work.

Are your fans turning on?

What else is your system doing when you turn it on?

 

[Jordancj]

14 minutes ago, MadAnt250 said:

Are your fans turning on?

What else is your system doing when you turn it on?

 

Hi so I tried unplugging the GPU and everything boots without it and works I can get into the bios if I unplug the gpu

[MadAnt250]

10 minutes ago, Jordancj said:

Hi so I tried unplugging the GPU and everything boots without it and works I can get into the bios if I unplug the gpu

The first time it would not post did you have your monitor connected to your GPU?

[Jordancj]

17 minutes ago, MadAnt250 said:

The first time it would not post did you have your monitor connected to your GPU?

Yes

[MadAnt250]

1 hour ago, Jordancj said:

beeps one long beep and 3 short beeps.

Oops, now I read/see this. Make sure the GPU is seated good and your power connections are good. If that does not work see if you can try a different GPU if available.

 

[Jordancj]

42 minutes ago, MadAnt250 said:

Oops, now I read/see this. Make sure the GPU is seated good and your power connections are good. If that does not work see if you can try a different GPU if available.

 

We realized that the Mobo needs an extra atx 12V 4 pin connector that my power supply doesn't have could that be the problem?

[Whiro]

1 hour ago, Jordancj said:

We realized that the Mobo needs an extra atx 12V 4 pin connector that my power supply doesn't have could that be the problem?

No. That connector is not necessary, mostly you using it for extreme overclocking. 
Is your gpu connected properly to psu?

Also what you can try is to unplug gpu and connect monitor to the motherboard, your cpu have igpu so it should be able to post, if it’ll post that’s mean there is problem with your gpu

[Jordancj]

18 minutes ago, Whiro said:

No. That connector is not necessary, mostly you using it for extreme overclocking. 
Is your gpu connected properly to psu?

Also what you can try is to unplug gpu and connect monitor to the motherboard, your cpu have igpu so it should be able to post, if it’ll post that’s mean there is problem with your gpu

It will not post even when connected to the Mobo and gives different beeps

 

[Whiro]

1 minute ago, Jordancj said:

It will not post even when connected to the Mobo and gives different beeps

 

Did you unplugged gpu when connected to mobo? 
Will be helpful to know what beeps is giving. It may be cpu or ram or mobo itself

[Jordancj]

2 minutes ago, Whiro said:

Did you unplugged gpu when connected to mobo? 
Will be helpful to know what beeps is giving. It may be cpu or ram or mobo itself

So when the GPU is connected it beeps once long and 4 short when it's not everything works and I am currently using the computer without the GPU and it beeps 5 times fast

[Jordancj]

20 minutes ago, Whiro said:

Did you unplugged gpu when connected to mobo? 
Will be helpful to know what beeps is giving. It may be cpu or ram or mobo itself

I moved it up a pcie slot into the top one and it works now for some reason so I'm not sure if it's a faulty pcie slot or because you have to use the top one first

[Whiro]

14 minutes ago, Jordancj said:

I moved it up a pcie slot into the top one and it works now for some reason so I'm not sure if it's a faulty pcie slot or because you have to use the top one first

Top one is usually priority one , but it should work on both of them tbh