Red LED when trying to boot from SD card. Need advice.
#3
The most common cause is not writing an image to the uSD card correctly for some reason. Some people have written the image to one of the partitions on the card rather than the raw device (say /dev/sdd1 when it should be /dev/sdd), so the data ends up in the wrong place. Others have removed the card immediately after the command returns, but before all data has been fully written to the card. There have also been reports of problems when using one tool to write the image that disappear when using another tool - whether this is because of a tool bug or user error using the first tool is hard to say.

The modified version of jumpdrive linked by 8bit above is in case of a hardware error that some have had - a broken switch in the uSD socket. I think there's also a patch for
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RE: Red LED when trying to boot from SD card. Need advice. - by wibble - 10-19-2021, 08:18 AM

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