开云体育

Hi all,
I bought a new NanoVNA-H on ebay and received it today. It seems to work, but when I connect it to a laptop using the supplied USB-A to USB-C cable, I get a warning "USB device not recognised. The last USB device you connected to this computer malfunctioned and Windows does not recognise it". I've tried connecting many times, different ports, rebooting, and a different laptop, but always get that message and the device shows up as "not working" in device manager.

I had a quick look at the board, the connections to the socket and soldering of the processor look OK, no shorts that I can see.

Has this been seen before, is there a solution or do I need to buy another one?

Thanks for any advice.

In case it matters - version 0.4.0-2-g7c2f745
No version marking on any of the PCBs as far as I can see (I took off the front and back covers).

All nanovna-h sold by us have version number marks on the PCB. Since rev3.4, we have also added version number marks on the shell labels.

hugen

I have discovered that this happens and everyone tells you the problem has
been solved. But when you try all the fixes, it still does not work! It
seems that the WIN10 virtual comport gets confused by having made many
changes. I don't know exactly why, but I found a site that has a "driver
fixer" and that worked for me.

Here is a link:


Please let me know if this solves your problem too!

Robert M.

when I connect it to a laptop using the supplied USB-A to USB-C cable, I get a warning

A bad cable is among the first things to suspect.

Ive had this issue a few times on win 7 sp1,seems the windows updates screws the drivers up,normaly reinstall the st whatever it is driver and then it works,not sure on win 10 tho as i hate it with a vengance! 73.

It was very definitely the cable. After buying a new cable, windows recognised the device automatically, no messing with drivers was needed, and NanoVNA Saver worked first time.

Apparently some sellers of clones are cheaping out on the accessories, and the cable is junk (maybe it's intended as a phone charging cable only).. mine was missing a "short" and "open" cal standard as well.

Thank you.

LOL Being a drone pilot, I first thought Zadig ( problematic) or Implusrc's fixer might do the tric... trying as of now... Will keep you posted...

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VE2DGK
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