I have 2 Amb transponders that are giving up and really hate to think about just throwing them away, so is their any place that repairs these older personals, so if you have some first hand knowledge on a repair place please share as Google wasn't very friendly and searching here came up with 6 plus year old thread

Nobody really messes with them to much ,if the wire is broken outside the case then you could try to reconnect, it takes a lot of time if u have to get into the transponder it self.the mylaps are easier I’ve tried and it worked for a while, I’ll by them off you for 40 each if u want to sell them. Pm me I like tinker I got around

How to get AMB Mylaps racing transponder repair world wide service (transponderservices.com)
seen a guy in Australia did them.not sure anymore

That was what I seen with Google but didn't know if it was a scam or not and had hoped people had them repaired in past woukd say how or where they had them done

they have an email listed on the website in Contacts. Shoot them a message and see if they respond.
Then post their response here for an update to others.