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Compute Module • Previously working CM5 board boot failure with solid red light on IO board. How to debug?

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I have been working with a CM5 (32GB / 4GB / Wireless) connected to the IO board for a couple of weeks without issue, but I shutdown the device recently and found that it wouldn't restart into the OS.

I thought it may have been due to the work I was doing on the OS so I re-flashed the eMMC but I still can't get the board to boot.

Using rpiboot `sudo ./rpiboot -d ./mass-storage-gadget64` works and I am able to re-flash, but once I remove the jumper and reconnect the power there is just a steady red light on the IO board.

Is there anything I can do to debug this? No output on the screen if I connect the monitor, although when using rpiboot I do get the mass storage gadget login screen.

Statistics: Posted by danic85 — Fri Jan 03, 2025 2:20 pm — Replies 0 — Views 35



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