I’m really someone can help with this issue. I got a bunch of older Maestro E206XT units that use the SL 9090 chips. However, while trying to update the firmware on 3 of these units, they became non-responsive. I’m guessing that the firmware update didn’t complete or is stuck on the update.
Does anyone have the knowledge/equipment on how to bring these units back to the land of the living? At my wits end.