I have a 150/75 mppt I bought in 11/2015, I did a firmware update recently and it gave an error saying that all old settings are lost. When I looked at the screen it was flashing "boot" I can't access it anymore. I took it to where I bought it and they said nothing can be done. Any ideas? I have replaced it with a new 150/70, but would like to use it for another system i have. It was rock solid till the update.