When i power on my laptop, it Shows the toshiba Screen and then it is going to black screen and again going to toshiba screen. and continuously laptop is restarting with that screens. (My laptop is Toshiba L755)
1. Power off the computer and disconnect all the power sources and external devices.
2. Press and hold the power button for 10-15 seconds and then release.
3. Put the AC adapter and battery back and power on the computer and check if the computer boots normally.