3d-printing
Hardware Tinkering
ThinkPad X390 Yoga supervisor password bypass: grounding DBG1 pin 9 on the LBB-1 board
Aug 17, 2026Two £100 Marketplace ThinkPad X390 Yogas, both locked by an unknown BIOS supervisor password. Briefly grounding DBG1 pin 9 on the LBB-1 board got me in, and got me two working laptops.