Chosen Solution

hello, i have an iphone 6s that keeps rebooting but instead of what others have…my screen has a huge no signal type screen that flickers. I will attach a pic to get a better understanding. From trying to reboot, i get an error code 4013. I read that it could be a proximity or front camera faulty cable so i tried to disconnect it but it would still give me the error. I am at a loss on what to do next. Thanks for any help.

If your screen is showing that and another screen has been tried you have a big issue on the logic board that can only be fixed via board level repair / microsoldering.