Axon AxoClamp 2B Current and Voltage Clamp. I cant get any of the lights on the colored buttons (Bridge, DCC, SEVC, TEVC) to come on. When pushing the DCC or SEVC buttons, numbers show breifly on the "sample rate" readout and then it goes to what is shown in the photos. If I push the Bridge or TEVC buttons then the Sample Rate readout turns off. Unit is being sold for "parts/not working" only, assumed in need of repair. Comes with power cord only, nothing else included.