Lenovo Is6xm Rev 1.0 Motherboard Manual 💫

Elias traced the circuit with his finger. The jumper, labeled JP11 , didn't connect to the southbridge or the BIOS chip. It ran to a hidden layer of the PCB—Layer 4, which the official BOM (Bill of Materials) listed as "ground plane." But the manual revealed it was a Faraday cage. Inside that cage was a discrete, unpowered memory cell. A physical, hardware-level backdoor.