On the bench tonight, I pulled another Tek P6042 current probe out of the closet. I have four of them...one which is known-good, with a repaired cable, and calibrated, that is in service. Another which is definitely bad, with broken wires in the probe cable at the very least, and then two more I have accumulated at property auctions. This particular example was showing symptoms of not working. When you set it up, there was a large, permanent ~7 Vdc offset present that could not be controlled and the probe locked light was not coming on. I disassembled the probe and beeped out all the conductors, which were fine. And amazingly enough, the problem was something to do with the probe because after re-assembly it started working right. And it agrees with my in service P6042! That probe is the top trace and the just-fixed one is the bottom trace, in the pic.