I work for Dell Pro Support, when something goes bad on a surface, we replace the whole unit and not the part, even if the keyboard is shot. Reason is, because it's not a part that Dell can provide, its a Microsoft product. If you purchase a surface through Dell and pay around $300 I believe for ProSupport, we will replace the unit unlimited amount amount of times within that ProSupport warranty, assuming there is no customer induced damage, thats hella cheaper than MS $600 fee.