motherboard rgb header I plugged my rgb fan cable into a rgb header. HELP PLEAS

[MajorL]

Sooo I plugged my led fan rgb header into the rgb header. It doesn’t post, it only turns on for less then a sec then turns off,I know it’s not the GPU or the Ram or the psu, what should I do?

 

mb:tuf gaming b450m plus matx 

cf:cm mf 120r a rgb

[Valkyrie Lenneth]

prolly put it on in reverse and it shorting, theres only 1 way that thing goes on

[MajorL]

1 minute ago, Valkyrie Lenneth said:

prolly put it on in reverse and it shorting, theres only 1 way that thing goes on

I put it back to normal tho

 

[Origami Cactus]

Did the computer post before RGB cable insertion?

Did the computer ever post?

What cpu?

[MajorL]

10 hours ago, Origami Cactus said:

Did the computer post before RGB cable insertion?

Did the computer ever post?

What cpu?

Yes it posted before the insertion 

lit posted every time

ryzen 2400g