What USBC/HDMI/Cable standards are required to enable LG TV as monitor for iphone 16 pro

With the iPhone 16 Pro now having full USB-C support (including DisplayPort over USB-C), there are a few key standards and considerations to get your LG to display properly.

USB-C Adapter Must Support DP Alt Mode (DisplayPort Alt Mode)

• Not all USB-C to HDMI adapters support video output — even among those that do, many only support up to HDMI 1.4 or lower resolutions. The Boneik adapter you’re using might not fully support HDMI 2.0+ or may have signal compatibility issues with the iPhone’s DisplayPort alt mode output.
• Look for a USB-C to HDMI adapter with HDMI 2.0 or 2.1 support and explicit iPhone 15/16 Pro compatibility.

HDMI Cable Standard

• I suggest only using Premium High-Speed HDMI cables (HDMI 2.0 or 2.1 rated). However, since you've tried different HDMI cables, it's more likely the adapter than the cable.

Color Space Mismatch (YCbCr vs RGB)

• Some adapters or devices default to YCbCr instead of full-range RGB. If the iPhone or adapter forces a signal the LG interprets incorrectly, the result can be color distortions like you're seeing.

Ok, with that said, here are some suggested fixes:

• Try an Adapter That Supports HDMI 2.0+ and DP Alt Mode: Look for Apple's USB-C Digital AV Adapter, or Anker’s USB-C to HDMI Adapter (model A83120A1 or newer) — both explicitly support 4K60 and proper HDR over HDMI.
• Force RGB Mode on the LG C3 (if possible): In LG Settings > Picture > HDMI Deep Color, turn it on for that input. Also, check the "PC Mode" or "Input Label" — if it’s set to something like “Blu-Ray” or “Game,” try changing it to "PC", which often enforces RGB input.
• Avoid USB-C Hubs with HDMI Ports Unless Spec'd Clearly: Cheap hubs often mishandle color spaces or reduce output to 4:2:0 chroma, which can cause red tints or washed out colors on OLED panels.

Finally, try a direct connection test:

• Use a USB-C to HDMI cable (not adapter) that supports HDMI 2.0+ and is known to work with Macs or iPads for video output. An example would be Cable Matters USB-C to HDMI 2.0 cable.

You're very welcome!