White noise display, touch screen and phone working.

My LG G2 screen occasionally become like this. Touch screen still works. Probably something inside is loose due to drop while a few knocks on it can bring it back to normal.

However, yesterday dropped another time and knocking does not help this time.. for awhile screen was dark but after putting a tape under the white antenna cable the noisy screen is back.

Would like to know better what/which connector is affecting it. Can it be fixed without removing the screen?