Phillips 40PFL7007T/12 Flickering Issue

I've been experiencing this issue where the right side of my TV which is a Phillips 40PFL7007T/12 has been flickering.

Here's a video - https://youtu.be/24LnNwF_gYI

I've tried various HDMI ports and different HDMI leads, but that hasn't resolved the issue.

Could this be a loose connection or something failing?