My Xperia also died on me. I wated to make a call but screen went black with a slight illumination in bottom right corner.
I couldnt restart it without taking out the battery. I was trying to wake it up by removing the battery at least 20 times.
When I pressed on button there was vibro as usually when phone starts but nothing happened.
I found this support forums and installed Sony PC companion. Phone was recognised by programm but I couldn't do anything. I've tryed to do "repair my phone/tablet" Green led was lit but phone didn't start after program completed the task of updating software. My sim card was already in an old Nokia and I've already looked up prices for Xperira ZR and Z1.
Buying new phone just after registration of my car would be a big smash on my budget ATM.
Ive tryed USB PCC repair like 3 - 4 times more and NOTHING happened.
I've even throw it on the floor couple of times and agressively twisted the body...
Yesterday I've tryed repair again and WOW I could finally see Sony logo at the start... boot took liike 2-3 minutes.
Then phone booted in Android 4.0.1 and I was really happy I don't need to buy new.
All I can say, don't give up, keep on trying with PCC repair, It took me like 4 times without resauts and then it came back to life.
