If the disk signature is corrupted or has somehow been changed, it's very likely that BIOS won't be able to find the boot sector, and so, of course, won't be able to load the necessary instructions for finding and starting the operating system.
Ọ bụrụ na emerụla mpempe akara ahụ, ma ọ bụ gbanwere n'ụzọ ụfọdụ, ọ dị nnọọ ka BIOS agaghị enwe ike ịchọta akpụkpọ ụkwụ ahụ, ya mere ọ gaghị enwe ike ịkwado ntuziaka ndị dị mkpa maka ịchọta na ịmalite usoro sistemụ ahụ.