Can a graphics card damage a TV? Because I experienced the same thing with two TVs, using an RTX 5070 Ti (extreme color banding after while in both Windows and bult-in TV apps, menu)

I’ve never heard of this before, but is it possible for a graphics card to damage a TV? I’m asking because two TVs in a row have shown the exact same behavior for me.

1. I had a TCL 98C7K TV for several months. It initially produced a beautiful image with perfect color gradients, then suddenly went crazy, and color banding / posterization became visible in almost all content.
2. When the problem first appeared, I toggled Windows 11 Automatic Color Management on and off, which temporarily fixed it. Later the problem returned, and this method no longer helped.
3. What’s interesting is that sometimes while browsing, if two Chrome windows were open side by side, one would show color banding while the other showed none at all, despite displaying the same content. Later on, the issue appeared everywhere.
4. Eventually I factory reset the TV, downgraded and updated its firmware, and even reinstalled Windows, but nothing helped. Games, Steam, online images and videos all showed heavy banding.
5. It’s important to note that banding also appeared in the TV’s own, PC-independent elements and menus (e.g. the built-in YouTube app), even after the HDMI cable was unplugged.
6. After that, the TV was replaced via a voucher with a Samsung S95F. I’ve had it for a few weeks now and it’s been great — but now I’m noticing posterization and banding in its own menus as well, which is pretty WTF. For example, when adjusting the volume and the volume box pops up on the left, the blue gradient looks unnatural, made up of noisy pixels and semicircular bands. And this issue also persists after unplugging HDMI.

I’m honestly going crazy over this. What could be the problem? I’ve found maybe two sources online where others reported experiencing extreme color banding as well, also while using an RTX 5070 Ti.