S7 edge flickering

[AC Question]

I just ended a call and when it was in call application a small flickering came across the screen and after few seconds , the screen turned off. Then the screen was black but the back button and recent button kept on lighting on. I didnt do anything for few minutes then after reading on the net, I pressed the power and volume down button then it opened. The phone is working fine for now. Should I be worried? What caused the phone to static ? Is the problem rare or now I should be thinking about it ?

 

[belodion]

Back up everything while you have the chance. It may indicate an impending hardware failure.