Need Advice for Wiping eMMC on Dead LCD Pinebook Pro

[calinb]

Why not temporarily set up an unsecured access point just for this?

I have "guest" APs in the clear but no OS that I've found will initially connect to them (upon first boot) without selecting the AP's SSD.

Do you have a serial console?  That would be the simplest and most straightforward way to do this.  Next simplest would he to pull the eMMC and wipe it oh another machine, with an adaptor.

No--no serial console and no other machine to wipe the eMMC, unless it is compatible with my Pinephone.

I was lucky that my Pinephone dock worked as a Pinebook Pro USB to Ethernet dongle, even though the HDMI didn't work. Using my Pinephone dock and Armbian (which has both DHCP client and server and SSH enabled on Ethernet for first boot), it was actually a very easy task. The tough part was discovering that these two tools were up for it! Armbian is designed to support headless SBC so it makes sense it would work. Most other OS devs are irrationally paranoid to enable SSH on first boot (security keys CAN come later or the service CAN be disabled later, after all).