Hello, I have a problem with my Sony Xperia ST26i smart phone, I have forgotten my password, and now phone after i turn it on normally does not doing nothing. So i can't make Hard reset, i can't boot in flash mode ( my windows 10 PC doesn't recognize USB Device after i install all proper drivers) and there is not working any secret code except code for IMEI info or maybe i just don't know proper code for that model. I have also tried Volume Down button+USB Cable connecting to PC but nothing happens - just green light turns on but that's all. Any advices what to do? Thanks