Hello,
I need help with my lab board. First I want to mention that I’m total noob in electronics, I do coding more and sometimes do some tinkering using totem lab board.
Today I was try to experiment on circuit with npn transistors and n mosfets while using different voltages up to 12V from vreg.
Im not exactly what error I made, wrong connection or I shorted something while probing with multimeter, but after disconnecting power from whole totem lab and then connected again, the totem mini lab board does not light up 
When connected to power supply I can hear whining noise from totemduino when it is connected to lab board. For the voltages - all are ok on totemduino, but there is no 3.3V on lab board itself.
Is there any way to fix this? Is there some fuse Brown that I can replace to make it to work again?