How to recover data from Linux partition now Ctrl-L stopped working?

I have an old Toshiba Chromebook 2 that I used using chrx and Linux Mint. ChromeOS stopped working long ago. As the battery was barely working, I bought a new laptop.

Yesterday, I wanted to look into the files on the laptop. However, Ctrl-L just give some beeps and the laptop does not boot further. I suspect the battery drowned and that impacted the boot order / reset RW_LEGACY. FYI, I think I installed SeaBios, not sure which version.

What can I do to recover the data?

  • getting the fysical sdd out of the laptop and reading it using a third party usb connector would work I guess? It is encrypted using LUKS, AFAIK that is just something I need to fiddle out once I can mount the drive in (another) Linux installation.
  • is it also possible to fix the laptop itself? How can I get the laptop to boot from Linux (assuming the ssd still works, which I do not know for sure)? Inserting a bootable USB does not work - the laptop tells me USB booting is not activated

My main goal is to recover the data, and I’m hopeful I can do that using such usb converter. What do you think?

looks like we solved this over on reddit

https://www.reddit.com/r/chromeos/comments/1grcyq0/how_to_recover_data_from_linux_partition_now/