I burnt my motherboard. Help!

[RainBridge]

Motherboard: Gigabyte AB350 Gaming wifi
CPU: 2200G
RAM: Corsair Vengeance lpx 16GB
GPU: Galax 1050ti

So I tested everything before I put all the components into the case, and everything is working. After I put everything into the case and turned the power on, I see white smokes coming out of the case, and immediately I shut the power down. And you guessed it, my motherboard is burnt...
https://ibb.co/c2FFXy

 

Does anyone know what could have possibly caused it? And what should I do next? Should I just buy a new motherboard and try it again? I am really afraid that it's gonna fry itself again.

[kelvinhall05]

My guess is one of two things:

1. You plugged something in wrong.

2. The motherboard was faulty (doubt it).

 

If I were you, I'd get an RMA.

[Vishvas Sudarshan]

You did install standoffs right? Exactly as required, not less not more?

[RainBridge]

7 minutes ago, kelvinhall05 said:

My guess is one of two things:

1. You plugged something in wrong.

2. The motherboard was faulty (doubt it).

 

If I were you, I'd get an RMA.

ok, thanks for the advise. I will get an RMA first

 

6 minutes ago, Vishvas Sudarshan said:

You did install standoffs right? Exactly as required, not less not more?

Yes, I'm using a Thermaltake Core V1 case, it comes with motherboard standoffs