I've newly replaced a motherboard to the below one(shown in the link).
And as I boot the computer I get the following messages with the shell environment.
Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions.
I've already inserted the CD which came with the motherboard.
As now, BIOS window can be displayed.
The ssd and other components like USB have been recognized by the computer.
What should I do for next?
The below components are mine.
What I tried after I've read the answer shown below.
I located the place where the os has been installed.
But I've been struggling to locate where the GRUB has been installed.
I tried "ls (hdX, Y)/boot/grub"
"error:unknown file system",
/boot/grub not found"
"themes/ x86_64_efi/ locale/ fonts/ unicode.pf2 grubenv grub.cfg"←place where OS exists.