I feel a bit sheepish having to ask this, but has anyone successfully gotten their deck to display on a LG TV (C2 to be precise)? I have the official dock and that works for other devices like my laptop or surface pro but no dice with the deck itself.
I've tried various things like resetting the device, resetting the dock, changing the order of connection them all up but not managed to get anything to show it. I also checked that the HDMI cable I'm using works for up to 8k. A bit frustrating as one of the reasons I got the device was to be the living room PC/link to my gaming PC!
In steam deck settings, there's an option for external monitor safe made. This limits resolution/refresh rate/hdr to improve compatibility. You can also try manually limiting external monitor resolution.
I know I had an issue where an slightly older TV I had started rejecting signal inputs if the resolution was too high or hdr was on. Originally I thought my deck's video output was broken, but I tried a 4k chromecast and the TV couldn't display it either (despite being a TV that had previously supported 4k and HDR). Limiting to 1080p with HDR off made everything work again.