Windows 10 installation Problem

I boot into my installation media USB and the installation goes normal until I get to the part where I have to select my partition, But there is no partitions and when I search for one it says unsigned drivers and I can’t make a new one. Can anyone please help me? Thank you.

Are you using rw legacy or full rom

Full rom its not also powering off 15 seconds after boot and I tried reseating the cables in the back but now it won’t post.

do an ec reset. Refresh + power

I tried that still no post I also don’t have the money to take it to a repair shop do you think it’s bricked because I get a power indicator but no post?