Hi,

I just purchased a brand new LG C4 42" to use as my PC monitor, upgrading from an older Alienware monitor.

I've got it setup and working when I set my resolution to 4k@60Hz, HDR on in Windows 11.

My GPU is a 4080 and I'm using a 15m HDMI 2.1 cable, specifically this one: https://www.amazon.co.uk/gp/product/B09QX5TBNX/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

This HMDI cable is capable of supporting 4k@120Hz but I can't get a signal when I try to select it in Windows. I found a post about setting it through the Nvidia Control Panel under "PC" resolutions but this also results in a no signal message.

I suspect I may get told to try a different cable which is fair, this one is long and I know it's capable of 85Hz because I used that on my Alienware monitor (that refresh doesn't seem to be available as a selection with the C4).

I'm going to try ordering a new cable but I was hoping there's something else I'm missing because I'd rather not have to swap it out if possible!

Thanks in advance for any suggestions,

Ben