On a Raspberry Pi 4, the green “ACT” LED indicates boot errors using certain blinking patterns. The following table shows what the different patterns mean (source of the table is the official documentation). Hint: In case your LED does not flash, or turns completely of after some flickering, your EEPROM bootloader might be corrupt. InContinue reading “Raspberry Pi 4 – Blinking patterns of green ACT LED”
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