You may need to:Hi
I'm in the below situation:
I tried your method with a standard USB cable. I removed my lumia 1020 cover, than I detached and attached the battery.
After that, inserting the USB cable in the PC Type-A Port and shorting green and black lines, I inserted the cable into Lumia 1020 microUSB .
The Windows logo lighted up permanently (good) but after 10 or more seconds, removing the USB modified cable and connecting a standard cable (or unshorting green and black lines) I cannot see any significant effect: the phone is recognized again as a standard USB device, but no QUALCOMM device, so I cannot flash it with thor2 that is not able to recognize any device. The PC Qualcomm drivers are installed. WDRT (related to thor2) as usual is unusable. I tried some variants, pushing start button and than volume+start during the process, but no changes.
1. Remove the battery of the phone
2. Wait 1 minute and reconnect the battery
3. Connect the modified cable to PC but not to the phone
4. Short the wires
5. Now connect the modified cable to the lumia
6. Now Windows will start installing drivers
It may get detected as USB Input device, that means that the device is in QUALCOMM Modem Mode, I still dont know what to do about that and I am doing researches.