Hi all here. I have problem with bios. 
i installed into my dell chrome os. Everything was almost ok so intried to change something in bios. I think i turned of something like legacy. 

now pc cannot boot, just black screen. I cannot get into boos. F2 and F12 dont work. I tried cmos reset by jumper. Also bios reset by battery plus jumper reset. Nothing. Just black screen. Any advise?