i don't think replace the cable will help you, because i have the same problem and i found a way to fix it , i use a program to help me the program name is TG PRO u have to buy it when you start your computer he was in sleep mode or turned off your mac gonna be cold or adapt to the room temperature when its to cold your screen gonna flickering so... what u have to do is : open TG PRO>Fan>Manual and Slide it to the Right and after that your mac Gonna Stop flickering. its Work!!!
Yeah solve the problem at 50% i see the display line screen problem happen when my mac is cold i use an app : TG PRO TEMPERATURE to boost my processor and after 2-3 mins bossted everything doing good and i can use my mac, or i open the app required a lot ram processor to warm my processor and after i can use it!!! If someone have a better solution let me known :)
turn the phone off and turn it on again after put your sim card in sim tray . after 1 minute go to setting turn on airplane mode after 2 min turn it on after back to network select search network automatic.