Hantek LA5034 User Manual page 9

7. Finish new hardware search wizard.
Caution:
Do not disconnect any device from the USB bus while the computer is
communicating with the LA5034, or you may lose data and/or your ability to
communicate with the LA5034.
If the LED is illuminated but the turns off, the computer has lost
communication with the LA5034.To restore communication, disconnect the
USB cable from the computer, and then reconnect is. This should restore
communication, and the LED should turn back on.
LA5034 User's Manual
LA5034
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