My 'e', 'D', & '3' key no longer work. Can I, for instance, make the ' / ', ' * ', & '-' keys on the num pad type 'e', 'D', & '3'? I already opened it up to see if I could fix a hardware issue.
Well then - get to work Googling. If the keyboard isn't programmable, I doubt you'll get anywhere with that many keys not working. If it has that many keys not working, I'd say it''s at the end of its life.