There were no warning signs for this failure. Phone booted up normally this morning. After a few hours, I found it had turned off. Power button produced no response. Plugging into USB charger or PC produced the results in the video attached. It flashes a band on the upper part of the screen and then goes dark and then shows the battery symbol and than goes black again. This repeats as long as it is plugged in. Battery was at 60%. It powered on to charge mode just long enough to see it then back off again. I would like to recover my contacts if possible. Tried the battery removal and hold power button for 1 then 2 then 3 minutes. No help. Tested power and volume buttons with multimeter and they checked out ok. Any other ideas?