I recently got around to trying to get CM11 on my Xperia M. After following Sony's official instructions on their World developer siteon unlocking the bootloader, my phone induced a bootloop. I also suspect that fastboot isn't working, as volume down + usb plug in doesn't activate the characteristic blue LED on the phone's base... I'm really stumped. Any help would be much appreciated.
Another question, since I have no idea whether the whole process worked or not, will I be able to send it in to service, in case the situation's rough?