I have a Balboa ML 700 display and a TS-8000 Mach2 controller on my Thermospa Spa. My topside panel quit working. I get no readout or codes of any kind. No buttons work. At one point I was able to turn the tub lights on, but I think that has stopped functioning, as well.
The Spa works in every other respect. It stays hot. It circulates water and cycles through the auto routine which turns everything on for a couple of minutes. The other two small topside panels control their pumps as they are supposed to. I looked at the circuit board and I see no blown fuses or any other obvious problems. I took out the topside control panel and I don't see an obvious problem with it, though I haven't opened it up. This is about a three year old spa and the main board is less than two years old.
Any ideas? Is the panel servicable; can I take it apart and clean contacts, etc.?
Can I try moving the topside panel connector to one of the spare panel connections on the board and try that? There are three main panel connectors that are available.
Thanks

You can try an alternate plug but generally, once one of these things goes, it's gone.

They're not serviceable - actually rather messy.