The older control boards can be repaired. Email me, the rebuilder is the only ones with real prints, because they used to work for Curtis. they warranty their work and I have never had one of the rebuilds fail. new those controllers were$480, rebuild maybe half of that but they warranty it longer than original. So another option is up dating the old system but that is like $800, the question just came up with a customer last week. Scooter Doctor App

I’m happy to assist further over the phone at https://www.6ya.com/expert/bill_bcbb89783b08c489