Assembly is easy. also double confirmed the chip orientation. But once done, I plugged in USB, lights on, but the cursor won't move

[kevingzhang]

Assuming the firmware is pre-flashed into the chip. I expected it works after I plugin the USB cable to my Mac. But I can see the white LED is light but the cursor won't move. Is there extra step I was missing?

[breakfastpizza]

I had this issue on my Mac and it turned out that my Nano only worked with certain cables. I suggest trying a different cable (I had to try several before I found one that worked) if you haven't already.

[kevingzhang]

I am no luck. I tried all my cables, none of them work.

[jacobrathjens]

I am having the same issue, using the cable provided. Are there any other thoughts?

[jacobrathjens]

To clarify, I'm on Windows, not Mac

[kevingzhang]

I am using Mac. iPad and Android. Tried several cables. None of them work. Since there is no refund from seller, I will put it in trash.

On Sun, Aug 8, 2021, 2:23 PM jacobrathjens @.***> wrote:

To clarify, I'm on Windows, not Mac

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[jacobrathjens]

Ok, so I needed to reflow my sensor: second pin from the right on the bottom when you can read the LOTR text.

[kevingzhang]

Please post here if the problem solved.

[jacobrathjens]

Please post here if the problem solved.

Please refer to my prior comment: the error was a bad join on the sensor. Reflowing the joins resolved the issue.

[breakfastpizza]

Thanks for sharing @jacobrathjens. My nano has been working well so far but it never hurts to reflow solder so I will go in and reflow my sensor just to be safe.