I don't know if they can tell if it's a refurb but most everybody will have you send a defective product back to the manufacturer for repairs or replacement.
P.S. Welcome to the forum.
Somebody pitch in here about turn around time. The only thing I've got from Galaxy as far as warranty goes is they sent me a new stock hand mic. My other problem was a bad Viagra blue dot B board I bought from Star Electronics and Communications and had DTB Radio install. The board failed soon after. I replaced that one with a new Ranger experiential SMT V board.
I had originally bought my 959 from Amazon before I found out about where's the best places to buy one.
Request for Galaxy Repair Authorization Number
Or call
760-480-8800
I can only hope that Redman didn't do a mod to this radio that could have damaged the receive. The rest of the regular mods are reversible; but if he messed with the receive by adding a resistor to a diode to make the receive stronger, it has the downside of burning a few parts. Just send it to the Galaxy techs and they will set it right, they are really on top for taking care of their customers.