Trouble with lpc flashing

I followed the instructions here Parts — MNT Reform Operator Handbook documentation but no usb device message in dmesg after step 3.

Any suggestions for troubleshooting?

One question I had when reading: should the reform have ac power or battery power or both or neither?

I got it working, might have been a bad cable. Still not sure about the power question.

Did you flash without batteries connected? I think the documentation could at least point out disconnecting the power beforehand if that’s necessary.