I noticed the on-board "L" LED does not illuminate on my recently acquired UNO R4 WiFi. I took a close-up picture of the surface-mount LED and it appears it's upside down (contacts up). I can't help but wonder if I am alone with this unique issue. So far, I have not experienced any other problems…

"L" On-board LED not working

gilshultz July 9, 2023, 2:30am 3

I wonder how it passed testing? We simply call them LEDs.

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