New build not working

[younishajeer]

Yesterday I build a new system 
Mb: Asus Prime H370-Plus 
CPU: Intel 8400 
Ram: Curcial 2666mhz 16gb x2 
and there's no graphics card currently. 

After assembling everything and connecting it to the power the LEDs on the MB turned on, tried pressing the start button but nothing happened, tried booting it up using a screwdriver, nothing happened. 
However, it turned on when i removed the 8 pin CPU power, and the fans started turning

So what might be the problem?? I'm totally confused. 
All the parts are brand new.

[Streetguru]

2 minutes ago, younishajeer said:

 

Are you in the US? because I wouldn't have suggested any of those parts for a new PC...

You could try taking it out of the case in case there's a short somewhere, need pictures of the build though.

[LukeSavenije]

5 minutes ago, Streetguru said:

Are you in the US? because I wouldn't have suggested any of those parts for a new PC...

You could try taking it out of the case in case there's a short somewhere, need pictures of the build though.

nevermind... i was sleeping

Edited June 20, 2019 by LukeSavenije

[MojangYang]

Don’t power the pc without the 8 pin plugged in. Without it the processor and mobo will simply not work, but all fans will spin.

 

what power supply?

[younishajeer]

32 minutes ago, Streetguru said:

Are you in the US? because I wouldn't have suggested any of those parts for a new PC...

You could try taking it out of the case in case there's a short somewhere, need pictures of the build though.

No, I'm not in the US.. FInding parts where I live is very hard. 
 

Tried taking it out the case and nothing changed. 

Pictures of what do you need ? 

[younishajeer]

2 minutes ago, MojangYang said:

Don’t power the pc without the 8 pin plugged in. Without it the processor and mobo will simply not work, but all fans will spin.

 

what power supply?

It's FSP Hexa+ 500w. 
(Where I live the options are very limited and this is the best brand I could find + I've used this model in multiple other PCs without any problems).

[LukeSavenije]

16 minutes ago, younishajeer said:

It's FSP Hexa+ 500w. 

that's really not good...

 

and i don't care about brand

 

it's cheap, it's group regulated, it's time to buy a new one

[Streetguru]

18 minutes ago, younishajeer said:

 

I guess maybe blame the motherboard or power supply then, should swap one or the other if you have spare parts lying around.

Pictures of the whole build.

[LukeSavenije]

1 minute ago, Streetguru said:

I guess maybe blame the motherboard or power supply then, should swap one or the other if you have spare parts lying around.

Pictures of the whole build.

i expect the psu

 

especially since it's the old hexa, which is horrible

[Leanora]

Sounds like a short circuit.
If possible test with another PSU, I guessing it's the mainboard though. The question is what caused that in the first place.

Without testing with known good parts it's hard to say for sure.

[younishajeer]

Thanks everyone  

[younishajeer]

Problem solved. 

The issue wasn't any of the hardware, It was my stupidity. 

I had put the PCI-E power connector instead of the 12v one. 

[Sat1600]

2 hours ago, younishajeer said:

Problem solved. 

The issue wasn't any of the hardware, It was my stupidity. 

I had put the PCI-E power connector instead of the 12v one. 

And it fit? Aren't they shaped differently