I have been running 4.4 on my Arc S for 2-3 weeks, then the phone suddenly couldnt be charged, cannot turn it on either. I usually see a blinking red led. I once managed to connect it to my pc with "fastboot", or at least it looked like fastmode, but I couldnt flash the phone, the app said it's not connected. PC Companion cannot help either. Also my windows says that USB device malfunctioned and cannot be connected.
I have no ida why all this happened, as I didnt do anything like OTA updates or something like that.
The phone has unlocked bootloader.
Can someone help with this? Help.