I paid $120 plus shipping for the repair and can only say the communicators now work. Don't know what they did because they never told me. The invoice just said repaired with no specifics.
The communicators work fine. My only grip is that I wish they had a push to talk option and rely on VOX solely.
If you buy used be very careful. I purchased mine from Scott Burns online (a sledder) who told me they were completely functional but when I received them they didn't work and it cost me another $120 to fix them thru Collette. I didn't get a chance to use them this season because of how long it took to get them back from Collette.
Scott, if you are reading this, would appreciate you split the cost of repairs-I think that is fair.