Re: USB cable starts overheating when Power Supply is turned on

I replaced the stepper that was broken on the Sanguinololu board, I turned on the device without the USB cable in. Immediately the stepstick that I replaced started to heat up like crazy while all the others were still at room temperature. It is the stepstick closest to the PSU input on the Sanguino board.

Can it be *hypothetically speaking* that the person I bought the Sanguino board from made a mistake when putting it together?

I can't even start to measure because as soon as I turn on the power supply the Stepstick starts to heat up in a linear fashion and I'm afraid I will burn it.
Or can I measure the voltages on the Sanguino without the stepsticks in place?

Thanks for your reply NoobMan!