Boot loop following a failed ubuntu upgrade


I tried to upgrade ubuntu to the latest version the other day and had a power outage in the middle of the update.

If I boot the BPI, it shows the boot image for 5 seconds. Then the screen goes blank and it goes into an infinite loop.

What can I do in this case? I tried connecting to my laptop with a USB cable, but I don’t see the disk. I tried inserting a SD card but it won’t boot from it.

Tried pressing the uboot button while booting as well - nothing.

Thanks in advance!