I have the 24ch Mini Maestro that has been running nicely while I keep adding functions and connecting accessories. When I was doing something (cannot recall exactly what I was doing when this happened), the board stopped responding (external leds went dead). There was no sparks flying or anything obvious. USB was not connected. I tried powercycling without any luck.
When I so try to connect the USB, the red and yellow lights will come on dimly but the pc will not connect.
The green light will not come on. After a few seconds, one or more of the 3 components in the red circle will become so hot that I will burn my finger. This also happens with a clean card (no other connections). I never keep the the usb connected for more than a few seconds. I have tried 2 different pc’s and a powered hub but its the same.
Could this be anything but a hardware problem? Any idea what is fried?
I will order a new board as the prototyping must go on, but out of curiosity it would be interesting to know what might have happened, and if there is anything I can do to bring it back to life.
EDIT: I tried putting thin strips of wax to pinpoint the exact components. Seems its the resistor to the right inside the circle and the component just outside the left side of the circle.