Red LED when trying to boot from SD card. Need advice.
#4
(10-18-2021, 09:38 PM)8bit Wrote: Can you boot Jumpdrive off a SD card? https://github.com/dreemurrs-embedded/Ju...e/releases

Does this modified version work? https://github.com/8bitgc/Jumpdrive/tree/master/test

Thank you for the reply, I was not checking for a reply until today. I was able to find these resources before you sent them. But thank b/c it was definitely the same issue.

I was able to diagnose and repair the issue. It was in fact a hardware issue. In my search after posting I found the comment about trying the modified jumpdrive. It was the same issue as the gent who posted it. I purchased a micro sd card extension and it broke the tiny lever inside the sd card slot. The guy who posted before was using the pine64 version, I purchased the only one I could find on amazon. I would stay away from them, just my humble opinion.

I saw another post about a guy who looked at the schematics and found the solder points. I don't have a soldering iron, so I found another way to accomplish the same thing.

In normal use with a working lever/switch. The tiny lever touches the back of the metal shielding telling the device that a sd card is inserted. So I gently bent open the rear of the metal shielding to see what it all looks like. From my quick analysis I could tell this type of switch was electrical, not mechanical. So I figure if I could find a way to take what was left of damaged lever and cause it to make contact with the metal shielding it might fix my issue.

So I took a pair of tiny tweezers and bent the lever in a U shape to come out slightly and curve into the shielding. To my surprise it worked and now my pinephone can boot normally from a micro SD card.

(10-19-2021, 08:18 AM)wibble Wrote: 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

Thank you it was the damages sd card lever.

Can you link me to any info about the patch.
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Messages In This Thread
RE: Red LED when trying to boot from SD card. Need advice. - by サーバント - 10-19-2021, 11:17 AM

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