What can be possible reason of Screen flicking issue in Nexus 5

[AC Question]

I am using Nexus 5 and since couple of days its screen is flicking. I tried to run phone on safe mode to know whthr its due to any third party app installed. but its same in safe mode also.

 

[belodion]

A remote diagnosis is hardly possible, alas. The phone needs to be in the hands of a repairer.