Bricked while transiting from SD to M.2

#1

Hi.
I was runing ubuntu from SD and wanted to move my system to an M.2 ssd. I was following some tutorial (which i’m not struggling to find) and everything went accoring to plan, until the point at which the device was supposed to start booting from SSD. But instead it wouln’t boot from SSD or SD. I’ve connected serial console, but it’s silent across power cycle. Green led is on, but no other signs of life. So how do i go about bringing it back to life?

#2

Remove m2 for testing purpose.
Try with a working os with uboot on sdcard and if it still doesn’t boot then enable maskrom during boot time.

I suspect you flashed something on spi if you have one.

First you need to try to get something up on the device bootlog to know what’s happening.

#3

Hi, and thanks for the reply.

Remove m2 for testing purpose.

That’s the first thing i did.

Try with a working os with uboot on sdcard and if it still doesn’t boot then enable maskrom during boot time.

That’s the second thing i did, prepared a brand new SD with fresh image for the board. Still not booting.
I’m not sure i understand the maskrom mode, i’ve shorted pins 23 and 25, and powercycled with maskrom button down. The board started blinking blue(irregularly) for a while, then the blue led went off. I didn’t see the device in local net so i assumed it didn’t boot, was this wrong?

I suspect you flashed something on spi if you have one.

How do i know if have spi (rom?) The board Rockpi 4B

First you need to try to get something up on the device bootlog to know what’s happening.

How do i access the boot log? Can i mount the device as a disk in host mode?