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Com port not working on HP ProDesk 400G3 Mini PC

HP Recommended
HP ProDesk 400G3 Mini PC
Microsoft Windows 10 (64-bit)



The com port (com2) is not working on my HP ProDesk 400G3 Mini PC.  This is the second PC of the same model I am having this problem with...


It appears to be working fine in device manager etc.. but just doesn't actually work.


Any ideas would be greatly appreciated.





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