If you are gentle, most of the keys are fairly simple, but you want to ensure to pop them off of the wire spring first, then they tilt out. Gentle lifting with a flexible metal bit, or being extremely careful with a standard pocket knife or thin screwdriver may allow you to lift the key up enough to see which side snaps into the wire, and which slides into pockets. Alternatively, you might find an entire replacement keyboard on Amazon or Impact Computers.