Early 2008 MBP Keyboard issues

Hi everyone. i have a early 2008 17in MBP. The machine is in very good shape and is working well but the keyboard now has an issue. Some the keys don't work and i am not sure why. its random keys at that so its not a strip of keys that went bad. In particular, the delete, caps lock, tab, space, fn, right option key, left arrow, down arrow, ' key. all other keys work just fine. I troubleshoot buy booting into recovery and it doesn't work there either. Anyone have a clue as to how to fix this without having to disassemble? How much would it cost for repair at the apple store? I also reset the pram with no fix. Thanks!