I have absolutely same problem with Lowdown 15, like the issue:
It means when I switch power on - All the lights from the "Clear, R&B, Rock and Grind" settings are burning and the threshold light is blinking.
After factory setting its not better.
Because it seems to me that it should be common problem, is it way how to fix it. If it could be problem of the power supply circuit or if it is for example more software problem?
Thaks a lot Martin