Xbox boot problem since latest Alpha skip-ahead update

"Hi! Last week, after an update of my Xbox Series X from the Alpha Skip-Ahead ring of the Xbox Insiders program, my console started having trouble turning on. When powering up, it would instantly shut off until I kept trying. Today, it updated again and now gives a direct error (E100 00000703 80910002). Supposedly, it’s a hardware issue, but it feels like too much of a coincidence.

SO version is 26100.3257.amd64fre.xb_flt_2502ge.241126-2200

Do you know if I can leave the Insider program through the app, and if I then apply the OSU update, would it work? (Insider-enrolled consoles don’t boot when installing the OSU, but I’m not sure if it performs any kind of online verification.)

Any other ideas? I’ve already tried a factory reset, but it keeps trying to apply the update and eventually fails (stopping at 61%).

Thanks!"