Can I remove my radio in my Corsa?

I just brought a Corsa N reg and I want to remove the current radio and replace it with a CD player.
But the radio in at the moment doesn't work as the code hasn't been entered in for it. I have the code but the display doesn’t work so I can't see what I’m doing.

So I was wondering if I took the current radio out and put a CD player in if it would work or not?

If it won’t work any ideas on how I can get it to work?

Thanks in advance.