Answer to: Notification led blinks 4 (four) times?I replaced the LCD screen and back camera. Now it won't boot up. There is no response at all from any of the reset option. The 120 second reset. The power+volume up, power+volume down. Nothing. When I connect to charger and hold down the power button, the red LED comes on for a second, then turns off, the phone vibrates 3 times followed by the red LED turning on again for a second and then turning off. Then the process repeats. Holding down the power or the 120 second restart button while plugged in yields the same results. I tried repair using pc companion, doesn't work.