Have anyone got success? .. last day while i was listening to music it suddenly died i even tried charging battery but no pulse red light nothing , after seeing your methods i i used Mi Flash> installed Qualcomm Driver and its showing in Device Manager but i cant flash it , i tired tweezing as well but not turning on nor flashingI did not use the short circuit step when my phone did not turn on. Not sure how bad the bricked have to be to be using the step. I think the important part is the "bcdedit /set testsigning on" (Run it with administrator's cmd) and restart. Start MiFlash let the drivers get installed, plug in the battery , hook it up to the PC and the device loaded up as Qualcomm HS-USB QDlaoder 9008. MiFlash success.
Try this: https://xiaomi.eu/community/threads/ultimate-cure-to-the-qhsusb_dload-of-mi2-s.20567/#post-168070Can anyone help me !!! :'(