These units all have some type of note on them indicating something is wrong. They are sold as-is. Some examples of the notes are "bad board", "no good", or "bad signal". We advise that purchasers are familiar enough with these units to diagnose issues and make repairs. NOTE: the remaining 3 units do not have the offset rack mounts as pictured. The next 2 units to sell will have rack mounts flush with the front of the unit. The last unit to sell will not have rack mounts.