Question 2 b450 mobos possibly dead on arrival

[Esuzail]

So i got two new b450 tomahawk motherboards(one for me, another for a friend) and both of them won't boot or even give a fan spin. I paired them with a r3 1200 and ruled out the ram or psu as the culprits. The only thing that works is the led light that lights up when you press the "bios flashback" button.
Please help

 

[NightHawkRMX]

What gpu are you using? The ryzen 3 1200 has no integrated graphics. What psu and ram are you using? Given its a first generation cpu, the ram is usually the culprit.

 

[shknawe]

Plz list your system specs to include ram and the psu.

 

[Esuzail]

I tried two psus and two different ram modules to check and see if one of them may have been the culprit.
First 8gb ddr4 ballistix @ 2400mhz, then 8gb ddr4 @3000mhz
As for the psu: first 430 watt cx430 and then an evga 850 watt gq.

 

[Esuzail]

What gpu are you using? The ryzen 3 1200 has no integrated graphics. What psu and ram are you using? Given its a first generation cpu, the ram is usually the culprit.

I understand the no boot part, considering the lack of an igpu, but i don't even get a fan spin.

 

[NightHawkRMX]

Some boards behave differently with no gpu. Given they vehave identically, try to use a gpu to test them.

 

[drea.drechsler]

So i got two new b450 tomahawk motherboards(one for me, another for a friend) and both of them won't boot or even give a fan spin. I paired them with a r3 1200 and ruled out the ram or psu as the culprits. The only thing that works is the led light that lights up when you press the "bios flashback" button.
Please help

If you have a speaker, connect it and read the beep codes...or does Tomahawk have trouble LED's that are lighing?? I agree that if you don't have a GPU it could be just announcing that as a problem and then sit patiently waiting for you to fix it.

I'd also try a battery-pull CMOS reset if it still does it with a GPU.

 

[Esuzail]

I tried using an rx 570 4gb gigabyte, and still nothing. I'll try looking for a speaker, but j doubt that will do anything as not even the error lights go on

 

[Esuzail]

Update:
I actually got it to work, so i switched off the psu, went to get a monitor, tried to turn it on again and i get the same issue

 

[NightHawkRMX]

Sounds like something is inconsistent. Id make sure memory is seated correctly and cooler and cpu are seated tightly.

 

[drea.drechsler]

Update:
I actually got it to work, so i switched off the psu, went to get a monitor, tried to turn it on again and i get the same issue

I had a problem once where the only way my computer would start is if i lifted my headphones up and put them on before i started it. What the problem turned out to be was the headphone cord tugging on the power cord plug in the PSU such that lifting them up to put on removed the weight allowing the loose plug to make contact. The fix was to firmly insert the power cord in the PSU.

Double check all connections that they are firmly inserted.