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BEAGLEBK: SD card boot fails

Part Number: BEAGLEBK


Good morning,

I'm trying to update to start beagleBone black from SD card, concerning this I've installed on the SD CARD

Debian 9.1 2017-08-31 4GB SD LXQT image   from    http://beagleboard.org/latest-images

I've formatted the SD-CARD with    HPUSBDisk-2.2.3.exe 

and written the image with               Win32DiskImager

I've followed the procedure:

0) remove power and/or usb connection

1) insert the SD CARD

2) Hold S2 button and insert power plug

the result is that the four led never flash as described, on the debug connector I can see a long long long sequence of "C" characters.

It seems to me that the sd-card reader is broken, how can I check this?

I've no problem when starting from eMMC but I want to change the image on the eMMC and it seems not possible.

Thanks

Antonio