The only issue I've ever ran into was an ultra slim cable that would be picky about what device it was plugged into. It just wouldn't send a signal. However, it still worked with 95% of my devices.
If the HDMI cable is well built, (eg. doesn't use metals that corrode easily, bad terminations between the cable and the plug, insufficient insulation, etc.) then it will just work as long as both the TV and the HDMI cable are up to spec. Yes, HDMI cables are backwards compatible.
@BLUEVOODU I would recommend trying out that Monster cable on another TV and see if it works. If it does, then it's your TV that's picky and the HDMI input might not be up to spec. HDMI was fairly new back then and I would not be surprised if LG did not properly implement the HDMI input.
I tend to get all of my audio/video cables from Monoprice. They have a lot of great cables for reasonable prices. I've replaced all of my HDMI cables recently with these -
Monoprice 4K Slim Certified Premium High Speed HDMI Cable 6ft - 18Gbps Black

Here is a list of devices and TVs/Monitors I use these with:
Devices
- PS3 Slim / PS3 Ultra Slim / PS4
- Xbox 360 / Xbox One S / Xbox One X
- Nintendo Switch
- 3 PCs hooked up to a KVM
- Panasonic 4K Blu-ray player
- Elgato 1080p external capture card
TVs/Monitors
- 2010 Samsung Plasma TV 720p/1080i
- 2019 TCL 4K TV
- 2011 Asus 1080p monitor
- 2020 Dell 1440p 165hz monitor (cable only goes up to 60hz but it works)
- 2010? Sony PlayStation 3D TV
I highly recommend them. If you need something that can go higher than 60hz,Monoprice should have some. Do not get Monoprice 2.1 cables as explained in the video of my next post.
If the HDMI cable is well built, (eg. doesn't use metals that corrode easily, bad terminations between the cable and the plug, insufficient insulation, etc.) then it will just work as long as both the TV and the HDMI cable are up to spec. Yes, HDMI cables are backwards compatible.
@BLUEVOODU I would recommend trying out that Monster cable on another TV and see if it works. If it does, then it's your TV that's picky and the HDMI input might not be up to spec. HDMI was fairly new back then and I would not be surprised if LG did not properly implement the HDMI input.
I tend to get all of my audio/video cables from Monoprice. They have a lot of great cables for reasonable prices. I've replaced all of my HDMI cables recently with these -
Monoprice 4K Slim Certified Premium High Speed HDMI Cable 6ft - 18Gbps Black

Here is a list of devices and TVs/Monitors I use these with:
Devices
- PS3 Slim / PS3 Ultra Slim / PS4
- Xbox 360 / Xbox One S / Xbox One X
- Nintendo Switch
- 3 PCs hooked up to a KVM
- Panasonic 4K Blu-ray player
- Elgato 1080p external capture card
TVs/Monitors
- 2010 Samsung Plasma TV 720p/1080i
- 2019 TCL 4K TV
- 2011 Asus 1080p monitor
- 2020 Dell 1440p 165hz monitor (cable only goes up to 60hz but it works)
- 2010? Sony PlayStation 3D TV
I highly recommend them. If you need something that can go higher than 60hz,