Dell Inspiron 15 7535 :: Laptop Screen With Horizontal Waves / Ripples

I have a 2 week old Inspiron 7535 and I am having issue with the monitor. I have the latest BIOS (7535A10) and latest Intel HD 4400 drivers installed.

Firstly, I had the "flickering and automatic dimming/brightening of screen" issue that is widely spoken about with this laptop.

I resolved that issue by doing the following:

Open Intel HD Graphics Control Panel
Select Power
Clicked downward arrow in top left of window and select On Battery
Disabled Panel-Refresh
Disabled Extended Battery Life for Gaming
Disabled Power Saving Technology
Apply

Okay, that was that fixed...

However, I am seeing another issue that I am beginning to believe is the display hardware itself.

There are horizontal waves/ripples moving downwards (on 60hz) that are only visible on darker backgrounds when the brightness is not set to maximum or minimum.

I have tried the following to no avail:

Ran Dell's diagnostic software, all passed
Held "D" when booting, solid colors looked fine because it displays them on full brightness (This issue only occurs between minimum and maximum brightness).
Uninstalled Intel HD Graphics 4400 software and re-installed with latest version. Still present.
Version: 10.18.10.2960

Checked if the ripples/waves were still present when in BIOS. They are.
Re-installed BIOS from DELL's downloaded driver. Still present.
Changed from 60hz to 40hz. Still present (Although horizontal waves/ripples seemed to move upwards instead).

I am running out of options here. I have heard that this could be caused by a loose connection of the monitor to the motherboard, however, if I open up the laptop to check this conncetion, will that void the warrenty?

For initial flickering issues I resolved above (Definite software issue), try opening paint and filling the screen with the dark-grey color, that is the best way to see these horizontal ripples/waves. (They are a little more visible on 60Hz)?