I can't install OS in a computer with no operating system

[111892]

Hello,my desktop computer does not have an Operating System, this is after i tried to format my computer but i followed a wrong instruction,. then i decided to put out the cd then restart it, but the computer didn't start, my friend says it is because there's no OS, then i tried doing again the steps in installing OS, but any keys i press or click doesn't work even the del, what will i do? thank i badly need your help

 

[kajabla]

It should get to the BIOS, which is the motherboard's built-in OS, without even a hard drive, let alone a CD.

 

[hang-the-9]

If the keyboard does not work you have hardware issues. Did you swap keyboards? Try to reset the BIOS on the system if you have not yet.