I know you out there know so many things. Please...i beg any of you to show how to repair my SE K850 firmware. Yet, I cannot switch on the phone. But when I connect the phone with laptop, only keypad is light up but not for the phone screen...still dark empty...no response at all. Already pull out and re-insert battery but still cannot do a thing.
I would advise a different route: in honor of WotanServer's 5th birthday, all unlocking and debranding firmware services are now free of charge. Register an account, download the client, and it's essentially now a one-step process. It will identify the 850, and you can choose which firmware to upload. That should solve the issue, as I have an 850 as a back-up, and have dealt with that issue on a couple of occasions. A whole lot easier than using A2.