is my ledger broken?

when trying to do checkGenuine, I receive this:

$ python -m ledgerblue.checkGenuine --targetId 0x31100002
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/Users/geoff/src/ledger/ledger/lib/python2.7/site-packages/ledgerblue/checkGenuine.py", line 129, in <module>
    secret = getDeployedSecretV2(dongle, bytearray.fromhex(args.rootPrivateKey), args.targetId, args.issuerKey)
  File "/Users/geoff/src/ledger/ledger/lib/python2.7/site-packages/ledgerblue/checkGenuine.py", line 40, in getDeployedSecretV2
    dongle.exchange(apdu)
  File "/Users/geoff/src/ledger/ledger/lib/python2.7/site-packages/ledgerblue/comm.py", line 130, in exchange
    raise CommException("Invalid status %04x" % sw, sw, response)
ledgerblue.commException.CommException: Exception : Invalid status 6a84

Start with ledgerblue/checkGenuine.py, especially getDeployedSecretV2, and trace the failing dongle.exchange call into ledgerblue/comm.py. Reproduce the shown checkGenuine command and investigate the 6a84 status; done means the cause and expected resolution are established.