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Following further testing I have got the Oscilloscope working, but not under ideal circumstances. With response to my points from the original post 4) With the laptop plugged in the oscilloscope flashed on and off in device manager indicating some problems with the connection, better than before 3) ...

I have purchased 7055-D to use with a USB power Oscilloscope (PicoScope 4262). I am struggling to get the Oscilloscope to function and want to know if there is a check-list of options to try? The Oscilloscope appears in device manager when plugged directly into laptop, but doesn't appear when plugge...