It’s not very dead really, I can SSH in and input commands etc, so hoping I didn’t need to solder or anything that drastic.
I just need to reset to factory so I can try again to make use of it but the “firstboot” command doesn’t delete this overlay and I think with trying to delete things manually I have stopped the wifi from working but comms with a usb cable works fine.
I tried to upload the original sketch as it says on the Respeaker page but the arduino IDE didn’t like it, kept throwing up syntax errors.