Screen flickering when connecting PC to TV

My current setup consists of an NVIDIA GeForce GT 430 1GB DDR2 card, a Dell UltraSharp W2240 monitor, and a Samsung 37-inch LED TV.
I have the PC hooked up to the TV using a 5-meter HDMI cable.
While the picture and audio quality on the TV are perfectly fine, my monitor is acting up—the image keeps flickering, almost like there are waves passing through the screen. Interestingly, if I unplug the HDMI, the flickering stops immediately.
I’ve already tested two other 5-meter HDMI cables, but the issue persists with all of them.
The monitor only features a VGA input (an analog connection), which I currently have connected via a VGA port on the graphics card. Since my card has a DVI-I port, I am considering buying a DVI-to-VGA adapter to connect the monitor via DVI-I instead. Would switching to an adapter potentially stop this flickering?
Is this actually a viable solution?
If anyone has any insight, thanks in advance.

It appears we are dealing with an inherent imperfection within the graphics card's own display controller; if the hardware is equipped with three independent controllers, then it would be prudent to attempt using a different DVI output instead. Furthermore, I would suggest that you try relocating the HDMI cable to a different HDMI port on your Samsung 37-inch LED TV to see if any discernible change occurs.

I’ve already attempted plugging the cable into different HDMI ports on the TV, but the result remains unchanged. My graphics card features three independent display controllers http://www.amd.com/us/products/deskt...verview.aspx#2, so my next move is to pick up a DVI-to-VGA adapter.
It seems like my only remaining option—I've exhausted every other workaround. The only time I don't see any flickering on the monitor is when I drop the resolution down to 720p, but that isn't a viable solution (the icons end up being massive).
Thanks for the response.
Best regards!

I picked up a DVI-to-VGA adapter—still getting that flickering issue.
Nothing works; at this point, it’s likely a fault with either the graphics card or the monitor itself.

William Nelson52 said:I picked up a DVI to VGA adapter, but the screen is still flickering like crazy.
Well, looks like we're down to the GPU or maybe just a finicky monitor then.

Ever thought about messing around with the drivers to see if that fixes it? ☕

I did. I installed the latest drivers, yet the flickering persists.
I suspect the issue lies with the monitor itself—likely due to that analog VGA input.
For what it's worth, my refresh rate is capped at 60Hz. It simply won't go any higher.

William Nelson52 said:Yeah, I updated everything to the latest drivers and it's still flickering.
I'm starting to think it might be the monitor itself, probably because I'm stuck using that old analog VGA input.
Plus, my refresh rate is capped at 60Hz; there's just no way to push it higher on this thing.

If that's the case, you're probably looking at a GPU issue, since it really shouldn't be flickering like that. 🤷