I don’t think it is a hardware issue. I have decent hardware that’s fairly new. I unfortunately can’t say much, though another commenter let me know the SSH failure message is relevant. It see connection closed, which means that it is probably failing to boot. I think an update or something may have broken it, though it is debian stable, so Idk. I’m going to try to call my sister and see if I can get a picture of an error message or something.