Why, when I inserted a new RAM, did the picture stop appearing on the monitor?

Question

System administration

I bought a bar for 8 GB of RAM, put a picture on the monitor, but the system unit works. Next I put a 4GB jet on the same place, and remove 8GB altogether, the picture appears, then turn off the PC, pull out these 4GB of RAM, put 8GB of RAM instead and the picture appears and this is how you need to do it every time to turn on the PC how can I fix it

Answer 1

Update bios + reset its settings.