U3-HV Not Connecting | LabJack

U3-HV Not Connecting

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led_issues's picture
U3-HV Not Connecting

Whenever I plug the LabJack into the computer via USB, the status LED blinks 3 or 4 times, but will not remain solid. I also cannot find it in the the device manager. Does this mean the LabJack is damaged?

LabJack Support
labjack support's picture
It sounds like the U3 is not

It sounds like the U3 is not enumerating properly. I would first recommend installing our newest installer package, power cycling the device, and then trying again:


Try rebooting the PC ( I would recommend a full shut down then power on rather than a restart).

After that, check that your device drivers are installed properly:


If that does not do the trick, you could try the other steps in part F here: