Untouchable state

Question

When I connect my device with USB to Windows PC it shows as




Marshall London HS-USB Diagnostics 9006




at device manager. Windows finds multiple device partitions and asks if I want to format them.



Device cannot boot properly. I cannot enter download mode or do factory reset with button combinations. Screen shows LG logo for a while and then goes dark (backlights still on). While logo is still up, it shows




Boot certification verify




message.



I have tried to connect to device with multiple tools, including ADB/Fastboot with no luck.



I got there by doing factory reset on rooted device. I got that message before I was doing factory reset and device booted just fine.



How do I connect to my device in order to flash its firmware? Or might be just restore to previous state? What does that boot certification message mean?


— featherbits | Sources

Answer

— featherbits | Sources

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