My Lenovo K52e78 is not booting

[AC Question]

My smart phone K52e78 is not starting but only showing the green rectangle part written Lenovo. How do I make it start again and be able to use it normally

 

[B. Diddy]

Welcome to Android Central! This kind of behavior often is due to a corrupt firmware or failing hardware.

First, force a shutdown by pressing and holding Power for about 10-15 seconds. Then try booting into Recovery Mode: LENOVO K5 Note - Recovery Mode - HardReset.info. If you're able to, select wipe cache partition.