Asus X570 TUF - Memory problem

[l1nku229]

Hi, i have problem with memory.
After few days offline i started my pc and i saw black screen. Few days ago all works fine.
Memory bank A2 wont work 😕 What can i do ?
I tried put all my memory to a2 and check other memory modules. Without succes, yellow led 😕
I record a movie with this problem.

Link to the problem : https://youtu.be/8pNTY6h25Zk

[l1nku229]

I try to reinstall CPU and remove battery for 15minuts. Still same problem :[ I Bought motherboard 10 days ago.