Question No image and ram problems

[CapNinja]

Hello, this is my first build and I'm a total newbie in this.
Asus B550M (Wifi) Zaku Edition
2x Vengeance LPX 8GB - 3600
Asus GT301
Ryzen 5 5600g
EVGA 500w
Thermalright AX90-r

My problems:

1. One of my ram isn't showing properly, if I change places she shows up, but I get nothing of her on single mode(I'm using the manual recommendation A2-B2, only shows B2)
2. After a clean install, I have 5 maybe 7 minutes of screen (using HDMI on TV) and then it goes black. Doesn't matter if wifi is on or off, it goes black anyways and after that goes black after BIOS, I can't even put my password.

Your help will be very much appreciated, thanks. If necessary, I can take photos of my hardware.

 

[drivinfast247]

Update the BIOS.

 

[CapNinja]

Update the BIOS.

Already did. It was necessary for Ryzen 5, used Bios Flashback. Now I am in the latest Version 2423

 

[CapNinja]

At first the pc lost signal during windows updates. Then I tried again, but with internet off.
Then I tried to install video driver from pendrive. In every time, there's a sudden signal lost and after post and bios option the video is off forever. But I can stay on BIOS indefinite time with no problems at all.