Hello,   I have an Analog Discovery 2 that has had an issue on Channel 2 of its oscilloscope for a few months now. Essentially, the channel measures around -25 V at all times, whether it is floating, grounded, shorted, connected to the BNC adapter board, etc. I have not used it in any high-voltage applications or scenarios.  I have attempted to manually recalibrate the oscilloscope, but I get an error when I do so telling me the voltage on Channel 2 is between -2.7418 and -2.7412