New PC built but it doesn't boot...or even turn on.

[Swiso]

Hello everybody,
I am having a big problem.
I just finished building my new PC, but when I start it, nothing happen.

The only things I notice are :

- the fan of the CPU cooler do only for half of a turn.
-I see the ROG red logo in the middle of the Mobo
-I see a yellow led in the BIOS led position
-the Start and reset buttons light is on

I installed all the cables needed (ATX 24 pin + 8 pin + 4 pin, 4 pin EZ plug)

The thing that bother me is that when I did the self test on the new PSU the result was a green light.
When I connect all the cables to the PSU, when I turn on the PC , I immediately hear like if the PSU "shut down" and I see a solid red light on the PSU.
I am not sure but I think that this solid red light mean there is a short somewhere.
I checked and rechecked all the cables and connections a couple of times but no success.
I removed all thecomponents, checked the CPU, RAM , cup cooler, everything but saw nothing strange (and no apparent damage) and everything was right in place.

So I tried with my old PSU (Corsair AX1200) and happened the same thing.

Any idea what could be the cause ?
What I should do ?

Thanks

[drop4205]

Are all headers for case power switches connected properly? Have u tried unplugging them and using poer button on motherboard? I had a case new that ended up being a faulty power button. Just asking.

[Swiso]

drop4205 wrote:
Are all headers for case power switches connected properly? Have u tried unplugging them and using poer button on motherboard? I had a case new that ended up being a faulty power button. Just asking.

Hello drop4205,
Yes I did that....same result.
I tried even with just 1 SSD and 1 GPU only and the whole front panel not connected...same result.

It's not the first PC that I build that's what frustrating...
I checked if the CPU is correctly installed and it is.

One thing I notice is that the both Qleds and the Q-Code LED remain off...no leds light on and no code appear.

Could it be a faulty motherboard?
How I can determine if the mobo is faulty ?

[Swiso]

Found the problem !
Was caused by a defected SATA power connector cable....
Lost three days on it....
Now going forward with the installation....

P.S : A quick question...on the three thermal sensor cables,on the connector, I see that on one side there is like a triangle mark over it....is that PIN1 or the ground ?

[Arne_Saknussemm]

Swiso wrote:
defected SATA power connector cable....

Annoying...you sending PSU back? or being pragmatic... problem sorted...

Triangle is pin 1

[Swiso]

Arne Saknussemm wrote:
Annoying...you sending PSU back? or being pragmatic... problem sorted...

Triangle is pin 1

No, I will not send back the PSU, it work and the cable may very well be one of the old PSU that I removed....
Thanks for the info on Triangle.

[Arne_Saknussemm]

Swiso wrote:
may very well be one of the old PSU that I removed....

Ouch! mixing cables can fry stuff...glad it's sorted then....let us know when it's running on all cylinders! 🙂

[Code_Frenzy]

If I had this type of problem then I'd probably remove the motherboard from the case and sit it on a box and try to power up just to rule out any chance of shorting in the case.

[drop4205]

Best thing is pull board from case and place on motherboard box it came in. Connect cpu, cooler, gpu, psu, hard drive and 1 stick of ram to test to eliminate a short from case. If you pull cpu are any pins bent? jump 24 pin on psu to test all 24,8 and 4 pin connectors. Others will chime in

[GoNz0-]

As above, pull the board, do a basic setup and see what happens, even without GPU you should get an error code. It does look like a duff board.